{
    "Hydrogen" : {
        "symbol" : "H",
        "atomic_number" : 1,
        "atomic_weight" : 1.00794,
        "melting_point K" : 14.01,
        "boiling_point K" : 20.28,
        "atomic_radius pm" : 79,
        "covalent_radius pm" : 32,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 14.1,
        "fusion_heat (kJ/mol)" : "0.117 (H-H)",
        "evaporation_heat (kJ/mol)" : "0.904 (H-H)",
        "pauling_negativity" : 2.20,
        "first_ionizing kJ/mol" : 1311.3,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 3.750
    },
    "Helium" : {
        "symbol" : "He",
        "atomic_number" : 2,
        "atomic_weight" : 4.002602,
        "melting_point K" : 0.95,
        "boiling_point K" : 4.216,
        "atomic_radius pm" : 0.0,
        "covalent_radius pm" : "-",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 31.8,
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : 0.08,
        "pauling_negativity" : "-",
        "first_ionizing kJ/mol" : 2361.3,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 3.570
    },
    "Lithium" : {
        "symbol" : "Li",
        "atomic_number" : 3,
        "atomic_weight" : 6.941,
        "melting_point K" : 553.69,
        "boiling_point K" : 1118.15,
        "atomic_radius pm" : 155,
        "covalent_radius pm" : 163,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 13.1,
        "fusion_heat (kJ/mol)" : 2.89,
        "evaporation_heat (kJ/mol)" : 148,
        "pauling_negativity" : 0.98,
        "first_ionizing kJ/mol" : 519.9,
        "lattice_structure" : "BCC",
        "lattice_constant ang" : 3.490
    },
    "Beryllium" : {
        "symbol" : "Be",
        "atomic_number" : 4,
        "atomic_weight" : 9.01218,
        "melting_point K" : 1551,
        "boiling_point K" : 3243,
        "atomic_radius pm" : 112,
        "covalent_radius pm" : 90,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 5.0,
        "fusion_heat (kJ/mol)" : 12.21,
        "evaporation_heat (kJ/mol)" : 309,
        "pauling_negativity" : 1.57,
        "first_ionizing kJ/mol" : 898.8,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 2.290
    },
    "Boron" : {
        "symbol" : "B",
        "atomic_number" : 5,
        "atomic_weight" : 10.811,
        "melting_point K" : 2573,
        "boiling_point K" : 3931,
        "atomic_radius pm" : 98,
        "covalent_radius pm" : 82,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 4.6,
        "fusion_heat (kJ/mol)" : 23.60,
        "evaporation_heat (kJ/mol)" : 504.5,
        "pauling_negativity" : 2.04,
        "first_ionizing kJ/mol" : 800.2,
        "lattice_structure" : "TET",
        "lattice_constant ang" : 8.730
    },
    "Carbon" : {
        "symbol" : "C",
        "atomic_number" : 6,
        "atomic_weight" : 12.011,
        "melting_point K" : 3820,
        "boiling_point K" : 5100,
        "atomic_radius pm" : 91,
        "covalent_radius pm" : 77,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 5.3,
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : "-",
        "pauling_negativity" : 2.55,
        "first_ionizing kJ/mol" : 1085.7,
        "lattice_structure" : "DIA",
        "lattice_constant ang" : 3.570
    },
    "Nitrogen" : {
        "symbol" : "N",
        "atomic_number" : 7,
        "atomic_weight" : 14.00674,
        "melting_point K" : 63.29,
        "boiling_point K" : 77.4,
        "atomic_radius pm" : 92,
        "covalent_radius pm" : 75,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 17.3,
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : "-",
        "pauling_negativity" : 3.04,
        "first_ionizing kJ/mol" : 1401.5,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 4.039
    },
    "Oxygen" : {
        "symbol" : "O",
        "atomic_number" : 8,
        "atomic_weight" : 15.9994,
        "melting_point K" : 54.8,
        "boiling_point K" : 90.19,
        "atomic_radius pm" : "-",
        "covalent_radius pm" : 73,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 14.0,
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : "-",
        "pauling_negativity" : 3.44,
        "first_ionizing kJ/mol" : 1313.1,
        "lattice_structure" : "CUB",
        "lattice_constant ang" : 6.830
    },
    "Fluorine" : {
        "symbol" : "F",
        "atomic_number" : 9,
        "atomic_weight" : 18.998403,
        "melting_point K" : 53.53,
        "boiling_point K" : 85.01,
        "atomic_radius pm" : "-",
        "covalent_radius pm" : 72,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 17.1,
        "fusion_heat (kJ/mol)" : "0.51 (F-F)",
        "evaporation_heat (kJ/mol)" : "6.54 (F-F)",
        "pauling_negativity" : 3.98,
        "first_ionizing kJ/mol" : 1680.0,
        "lattice_structure" : "MCL",
        "lattice_constant ang" : "-"
    },
    "Neon" : {
        "symbol" : "Ne",
        "atomic_number" : 10,
        "atomic_weight" : 20.1797,
        "melting_point K" : 48,
        "boiling_point K" : 27.1,
        "atomic_radius pm" : "-",
        "covalent_radius pm" : 71,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 16.8,
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : 1.74,
        "pauling_negativity" : 0.0,
        "first_ionizing kJ/mol" : 2079.4,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 4.430
    },
    "Sodium" : {
        "symbol" : "Na",
        "atomic_number" : 11,
        "atomic_weight" : 22.989768,
        "melting_point K" : 370.96,
        "boiling_point K" : 1156.1,
        "atomic_radius pm" : 190,
        "covalent_radius pm" : 154,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 23.7,
        "fusion_heat (kJ/mol)" : 2.64,
        "evaporation_heat (kJ/mol)" : 97.9,
        "pauling_negativity" : 0.93,
        "first_ionizing kJ/mol" : 495.6,
        "lattice_structure" : "BCC",
        "lattice_constant ang" : 4.230
    },
    "Magnesium" : {
        "symbol" : "Mg",
        "atomic_number" : 12,
        "atomic_weight" : 24.305,
        "melting_point K" : 922,
        "boiling_point K" : 1363,
        "atomic_radius pm" : 160,
        "covalent_radius pm" : 136,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 14.0,
        "fusion_heat (kJ/mol)" : 9.20,
        "evaporation_heat (kJ/mol)" : 131.8,
        "pauling_negativity" : 1.31,
        "first_ionizing kJ/mol" : 737.3,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 3.210
    },
    "Aluminum" : {
        "symbol" : "Al",
        "atomic_number" : 13,
        "atomic_weight" : 26.981539,
        "melting_point K" : 933.5,
        "boiling_point K" : 2740,
        "atomic_radius pm" : 143,
        "covalent_radius pm" : 118,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 10.0,
        "fusion_heat (kJ/mol)" : 10.75,
        "evaporation_heat (kJ/mol)" : 284.1,
        "pauling_negativity" : 1.61,
        "first_ionizing kJ/mol" : 577.2,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 4.050
    },
    "Silicon" : {
        "symbol" : "Si",
        "atomic_number" : 14,
        "atomic_weight" : 28.0855,
        "melting_point K" : 1683,
        "boiling_point K" : 2628,
        "atomic_radius pm" : 132,
        "covalent_radius pm" : 111,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 12.1,
        "fusion_heat (kJ/mol)" : 50.6,
        "evaporation_heat (kJ/mol)" : 383,
        "pauling_negativity" : 1.90,
        "first_ionizing kJ/mol" : 786.0,
        "lattice_structure" : "DIA",
        "lattice_constant ang" : 5.430
    },
    "Phosphorus" : {
        "symbol" : "P",
        "atomic_number" : 15,
        "atomic_weight" : 30.973762,
        "melting_point K" : 317.3,
        "boiling_point K" : 553,
        "atomic_radius pm" : 128,
        "covalent_radius pm" : 106,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 17.0,
        "fusion_heat (kJ/mol)" : 2.51,
        "evaporation_heat (kJ/mol)" : 49.8,
        "pauling_negativity" : 2.19,
        "first_ionizing kJ/mol" : 1011.2,
        "lattice_structure" : "CUB",
        "lattice_constant ang" : 7.170
    },
    "Sulfur" : {
        "symbol" : "S",
        "atomic_number" : 16,
        "atomic_weight" : 32.066,
        "melting_point K" : 386,
        "boiling_point K" : 717.824,
        "atomic_radius pm" : 127,
        "covalent_radius pm" : 102,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 15.5,
        "fusion_heat (kJ/mol)" : 1.23,
        "evaporation_heat (kJ/mol)" : 10.5,
        "pauling_negativity" : 2.58,
        "first_ionizing kJ/mol" : 999.0,
        "lattice_structure" : "ORC",
        "lattice_constant ang" : 10.470
    },
    "Chlorine" : {
        "symbol" : "Cl",
        "atomic_number" : 17,
        "atomic_weight" : 35.4527,
        "melting_point K" : 172.2,
        "boiling_point K" : 238.6,
        "atomic_radius pm" : "-",
        "covalent_radius pm" : 99,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 18.7,
        "fusion_heat (kJ/mol)" : "6.41 (Cl-Cl)",
        "evaporation_heat (kJ/mol)" : "20.41 (Cl-Cl)",
        "pauling_negativity" : 3.16,
        "first_ionizing kJ/mol" : 1254.9,
        "lattice_structure" : "ORC",
        "lattice_constant ang" : 6.240
    },
    "Argon" : {
        "symbol" : "Ar",
        "atomic_number" : 18,
        "atomic_weight" : 39.948,
        "melting_point K" : 83.8,
        "boiling_point K" : 87.3,
        "atomic_radius pm" : "2-",
        "covalent_radius pm" : 98,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 24.2,
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : 6.52,
        "pauling_negativity" : 0.0,
        "first_ionizing kJ/mol" : 1519.6,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 5.260
    },
    "Potassium" : {
        "symbol" : "K",
        "atomic_number" : 19,
        "atomic_weight" : 39.0983,
        "melting_point K" : 336.8,
        "boiling_point K" : 1047,
        "atomic_radius pm" : 235,
        "covalent_radius pm" : 203,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 45.3,
        "fusion_heat (kJ/mol)" : 102.5,
        "evaporation_heat (kJ/mol)" : 2.33,
        "pauling_negativity" : 0.82,
        "first_ionizing kJ/mol" : 418.5,
        "lattice_structure" : "BCC",
        "lattice_constant ang" : 5.230
    },
    "Calcium" : {
        "symbol" : "Ca",
        "atomic_number" : 20,
        "atomic_weight" : 40.078,
        "melting_point K" : 1112,
        "boiling_point K" : 1757,
        "atomic_radius pm" : 197,
        "covalent_radius pm" : 174,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 29.9,
        "fusion_heat (kJ/mol)" : 9.20,
        "evaporation_heat (kJ/mol)" : 153.6,
        "pauling_negativity" : 1.00,
        "first_ionizing kJ/mol" : 589.4,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 5.580
    },
    "Scandium" : {
        "symbol" : "Sc",
        "atomic_number" : 21,
        "atomic_weight" : 44.95591,
        "melting_point K" : 1814,
        "boiling_point K" : 3104,
        "atomic_radius pm" : 162,
        "covalent_radius pm" : 144,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 15.0,
        "fusion_heat (kJ/mol)" : 15.8,
        "evaporation_heat (kJ/mol)" : 332.7,
        "pauling_negativity" : 1.36,
        "first_ionizing kJ/mol" : 630.8,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 3.310
    },
    "Titanium" : {
        "symbol" : "Ti",
        "atomic_number" : 22,
        "atomic_weight" : 47.88,
        "melting_point K" : 1933,
        "boiling_point K" : 3560,
        "atomic_radius pm" : 147,
        "covalent_radius pm" : 132,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 10.6,
        "fusion_heat (kJ/mol)" : 18.8,
        "evaporation_heat (kJ/mol)" : 422.6,
        "pauling_negativity" : 1.54,
        "first_ionizing kJ/mol" : 657.8,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 2.950
    },
    "Vanadium" : {
        "symbol" : "V",
        "atomic_number" : 23,
        "atomic_weight" : 50.9415,
        "melting_point K" : 2160,
        "boiling_point K" : 3650,
        "atomic_radius pm" : 134,
        "covalent_radius pm" : 122,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 8.35,
        "fusion_heat (kJ/mol)" : 17.5,
        "evaporation_heat (kJ/mol)" : 460,
        "pauling_negativity" : 1.63,
        "first_ionizing kJ/mol" : 650.1,
        "lattice_structure" : "BCC",
        "lattice_constant ang" : 3.020
    },
    "Chromium" : {
        "symbol" : "Cr",
        "atomic_number" : 24,
        "atomic_weight" : 51.9961,
        "melting_point K" : 2130,
        "boiling_point K" : 2945,
        "atomic_radius pm" : 130,
        "covalent_radius pm" : 118,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 7.23,
        "fusion_heat (kJ/mol)" : 21,
        "evaporation_heat (kJ/mol)" : 342,
        "pauling_negativity" : 1.66,
        "first_ionizing kJ/mol" : 652.4,
        "lattice_structure" : "BCC",
        "lattice_constant ang" : 2.880
    },
    "Manganese" : {
        "symbol" : "Mn",
        "atomic_number" : 25,
        "atomic_weight" : 54.93805,
        "melting_point K" : 1517,
        "boiling_point K" : 2235,
        "atomic_radius pm" : 135,
        "covalent_radius pm" : 117,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 7.39,
        "fusion_heat (kJ/mol)" : "(13.4)",
        "evaporation_heat (kJ/mol)" : 221,
        "pauling_negativity" : 1.55,
        "first_ionizing kJ/mol" : 716.8,
        "lattice_structure" : "CUB",
        "lattice_constant ang" : 8.890
    },
    "Iron" : {
        "symbol" : "Fe",
        "atomic_number" : 26,
        "atomic_weight" : 55.847,
        "melting_point K" : 1808,
        "boiling_point K" : 3023,
        "atomic_radius pm" : 126,
        "covalent_radius pm" : 117,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 7.1,
        "fusion_heat (kJ/mol)" : 13.8,
        "evaporation_heat (kJ/mol)" : "~340",
        "pauling_negativity" : 1.83,
        "first_ionizing kJ/mol" : 759.1,
        "lattice_structure" : "BCC",
        "lattice_constant ang" : 2.870
    },
    "Cobalt" : {
        "symbol" : "Co",
        "atomic_number" : 27,
        "atomic_weight" : 58.9332,
        "melting_point K" : 1768,
        "boiling_point K" : 3143,
        "atomic_radius pm" : 125,
        "covalent_radius pm" : 116,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 6.7,
        "fusion_heat (kJ/mol)" : 15.48,
        "evaporation_heat (kJ/mol)" : 389.1,
        "pauling_negativity" : 1.88,
        "first_ionizing kJ/mol" : 758.1,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 2.510
    },
    "Nickel" : {
        "symbol" : "Ni",
        "atomic_number" : 28,
        "atomic_weight" : 58.6934,
        "melting_point K" : 1726,
        "boiling_point K" : 3005,
        "atomic_radius pm" : 124,
        "covalent_radius pm" : 115,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 6.6,
        "fusion_heat (kJ/mol)" : 17.61,
        "evaporation_heat (kJ/mol)" : 378.6,
        "pauling_negativity" : 1.91,
        "first_ionizing kJ/mol" : 736.2,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 3.520
    },
    "Copper" : {
        "symbol" : "Cu",
        "atomic_number" : 29,
        "atomic_weight" : 63.546,
        "melting_point K" : 1356.6,
        "boiling_point K" : 2840,
        "atomic_radius pm" : 128,
        "covalent_radius pm" : 117,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 7.1,
        "fusion_heat (kJ/mol)" : 13.01,
        "evaporation_heat (kJ/mol)" : 304.6,
        "pauling_negativity" : 1.90,
        "first_ionizing kJ/mol" : 745.0,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 3.610
    },
    "Zinc" : {
        "symbol" : "Zn",
        "atomic_number" : 30,
        "atomic_weight" : 65.39,
        "melting_point K" : 692.73,
        "boiling_point K" : 1180,
        "atomic_radius pm" : 138,
        "covalent_radius pm" : 125,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 9.2,
        "fusion_heat (kJ/mol)" : 7.28,
        "evaporation_heat (kJ/mol)" : 114.8,
        "pauling_negativity" : 1.65,
        "first_ionizing kJ/mol" : 905.8,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 2.660
    },
    "Gallium" : {
        "symbol" : "Ga",
        "atomic_number" : 31,
        "atomic_weight" : 69.723,
        "melting_point K" : 302.93,
        "boiling_point K" : 2676,
        "atomic_radius pm" : 141,
        "covalent_radius pm" : 126,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 11.8,
        "fusion_heat (kJ/mol)" : 5.59,
        "evaporation_heat (kJ/mol)" : 270.3,
        "pauling_negativity" : 1.81,
        "first_ionizing kJ/mol" : 578.7,
        "lattice_structure" : "ORC",
        "lattice_constant ang" : 4.510
    },
    "Germanium" : {
        "symbol" : "Ge",
        "atomic_number" : 32,
        "atomic_weight" : 72.61,
        "melting_point K" : 1210.6,
        "boiling_point K" : 3103,
        "atomic_radius pm" : 137,
        "covalent_radius pm" : 122,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 13.6,
        "fusion_heat (kJ/mol)" : 36.8,
        "evaporation_heat (kJ/mol)" : 328,
        "pauling_negativity" : 2.01,
        "first_ionizing kJ/mol" : 760.0,
        "lattice_structure" : "DIA",
        "lattice_constant ang" : 5.660
    },
    "Arsenic" : {
        "symbol" : "As",
        "atomic_number" : 33,
        "atomic_weight" : 74.92159,
        "melting_point K" : 1090,
        "boiling_point K" : 876,
        "atomic_radius pm" : 139,
        "covalent_radius pm" : 120,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 13.1,
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : 32.4,
        "pauling_negativity" : 2.18,
        "first_ionizing kJ/mol" : 946.2,
        "lattice_structure" : "RHL",
        "lattice_constant ang" : 4.130
    },
    "Selenium" : {
        "symbol" : "Se",
        "atomic_number" : 34,
        "atomic_weight" : 78.96,
        "melting_point K" : 490,
        "boiling_point K" : 958.1,
        "atomic_radius pm" : 140,
        "covalent_radius pm" : 116,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 16.5,
        "fusion_heat (kJ/mol)" : 5.23,
        "evaporation_heat (kJ/mol)" : 59.7,
        "pauling_negativity" : 2.55,
        "first_ionizing kJ/mol" : 940.4,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 4.360
    },
    "Bromine" : {
        "symbol" : "Br",
        "atomic_number" : 35,
        "atomic_weight" : 79.904,
        "melting_point K" : 265.9,
        "boiling_point K" : 331.9,
        "atomic_radius pm" : "-",
        "covalent_radius pm" : 114,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 23.5,
        "fusion_heat (kJ/mol)" : "10.57 (Br-Br)",
        "evaporation_heat (kJ/mol)" : "29.56 (Br-Br)",
        "pauling_negativity" : 2.96,
        "first_ionizing kJ/mol" : 1142.0,
        "lattice_structure" : "ORC",
        "lattice_constant ang" : 6.670
    },
    "Krypton" : {
        "symbol" : "Kr",
        "atomic_number" : 36,
        "atomic_weight" : 83.8,
        "melting_point K" : 116.6,
        "boiling_point K" : 120.85,
        "atomic_radius pm" : "-",
        "covalent_radius pm" : 112,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 32.2,
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : 9.05,
        "pauling_negativity" : 0.0,
        "first_ionizing kJ/mol" : 1350.0,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 5.720
    },
    "Rubidium" : {
        "symbol" : "Rb",
        "atomic_number" : 37,
        "atomic_weight" : 85.4678,
        "melting_point K" : 312.2,
        "boiling_point K" : 961,
        "atomic_radius pm" : 248,
        "covalent_radius pm" : 216,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 55.9,
        "fusion_heat (kJ/mol)" : 2.20,
        "evaporation_heat (kJ/mol)" : 75.8,
        "pauling_negativity" : 0.82,
        "first_ionizing kJ/mol" : 402.8,
        "lattice_structure" : "BCC",
        "lattice_constant ang" : 5.590
    },
    "Strontium" : {
        "symbol" : "Sr",
        "atomic_number" : 38,
        "atomic_weight" : 87.62,
        "melting_point K" : 1042,
        "boiling_point K" : 1657,
        "atomic_radius pm" : 215,
        "covalent_radius pm" : 191,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 33.7,
        "fusion_heat (kJ/mol)" : 9.20,
        "evaporation_heat (kJ/mol)" : 144,
        "pauling_negativity" : 0.95,
        "first_ionizing kJ/mol" : 549.0,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 6.080
    },
    "Yttrium" : {
        "symbol" : "Y",
        "atomic_number" : 39,
        "atomic_weight" : 88.90585,
        "melting_point K" : 1795,
        "boiling_point K" : 3611,
        "atomic_radius pm" : 178,
        "covalent_radius pm" : 162,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 19.8,
        "fusion_heat (kJ/mol)" : 11.5,
        "evaporation_heat (kJ/mol)" : 367,
        "pauling_negativity" : 1.22,
        "first_ionizing kJ/mol" : 615.4,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 3.650
    },
    "Zirconium" : {
        "symbol" : "Zr",
        "atomic_number" : 40,
        "atomic_weight" : 91.224,
        "melting_point K" : 2125,
        "boiling_point K" : 4650,
        "atomic_radius pm" : 160,
        "covalent_radius pm" : 145,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 14.1,
        "fusion_heat (kJ/mol)" : 19.2,
        "evaporation_heat (kJ/mol)" : 567,
        "pauling_negativity" : 1.33,
        "first_ionizing kJ/mol" : 659.7,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 3.230
    },
    "Niobium" : {
        "symbol" : "Nb",
        "atomic_number" : 41,
        "atomic_weight" : 92.90638,
        "melting_point K" : 2741,
        "boiling_point K" : 5015,
        "atomic_radius pm" : 146,
        "covalent_radius pm" : 134,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 10.8,
        "fusion_heat (kJ/mol)" : 26.8,
        "evaporation_heat (kJ/mol)" : 680,
        "pauling_negativity" : 1.6,
        "first_ionizing kJ/mol" : 663.6,
        "lattice_structure" : "BCC",
        "lattice_constant ang" : 3.300
    },
    "Molybdenum" : {
        "symbol" : "Mo",
        "atomic_number" : 42,
        "atomic_weight" : 95.94,
        "melting_point K" : 2890,
        "boiling_point K" : 4885,
        "atomic_radius pm" : 139,
        "covalent_radius pm" : 130,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 9.4,
        "fusion_heat (kJ/mol)" : 28,
        "evaporation_heat (kJ/mol)" : "~590",
        "pauling_negativity" : 2.16,
        "first_ionizing kJ/mol" : 684.8,
        "lattice_structure" : "BCC",
        "lattice_constant ang" : 3.150
    },
    "Technetium" : {
        "symbol" : "Tc",
        "atomic_number" : 43,
        "atomic_weight" : 97.9072,
        "melting_point K" : 2445,
        "boiling_point K" : 5150,
        "atomic_radius pm" : 136,
        "covalent_radius pm" : 127,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 8.5,
        "fusion_heat (kJ/mol)" : 23.8,
        "evaporation_heat (kJ/mol)" : 585,
        "pauling_negativity" : 1.9,
        "first_ionizing kJ/mol" : 702.2,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 2.740
    },
    "Ruthenium" : {
        "symbol" : "Ru",
        "atomic_number" : 44,
        "atomic_weight" : 101.07,
        "melting_point K" : 2583,
        "boiling_point K" : 4173,
        "atomic_radius pm" : 134,
        "covalent_radius pm" : 125,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 8.3,
        "fusion_heat (kJ/mol)" : "(25.5)",
        "evaporation_heat (kJ/mol)" : "-",
        "pauling_negativity" : 2.2,
        "first_ionizing kJ/mol" : 710.3,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 2.700
    },
    "Rhodium" : {
        "symbol" : "Rh",
        "atomic_number" : 45,
        "atomic_weight" : 102.9055,
        "melting_point K" : 2239,
        "boiling_point K" : 4000,
        "atomic_radius pm" : 134,
        "covalent_radius pm" : 125,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 8.3,
        "fusion_heat (kJ/mol)" : 21.8,
        "evaporation_heat (kJ/mol)" : 494,
        "pauling_negativity" : 2.28,
        "first_ionizing kJ/mol" : 719.5,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 3.800
    },
    "Palladium" : {
        "symbol" : "Pd",
        "atomic_number" : 46,
        "atomic_weight" : 106.42,
        "melting_point K" : 1825,
        "boiling_point K" : 3413,
        "atomic_radius pm" : 137,
        "covalent_radius pm" : 128,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 8.9,
        "fusion_heat (kJ/mol)" : 17.24,
        "evaporation_heat (kJ/mol)" : 372.4,
        "pauling_negativity" : 2.20,
        "first_ionizing kJ/mol" : 803.5,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 3.890
    },
    "Silver" : {
        "symbol" : "Ag",
        "atomic_number" : 47,
        "atomic_weight" : 107.8682,
        "melting_point K" : 1235.1,
        "boiling_point K" : 2485,
        "atomic_radius pm" : 144,
        "covalent_radius pm" : 134,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 10.3,
        "fusion_heat (kJ/mol)" : 11.95,
        "evaporation_heat (kJ/mol)" : 254.1,
        "pauling_negativity" : 1.93,
        "first_ionizing kJ/mol" : 730.5,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 4.090
    },
    "Cadmium" : {
        "symbol" : "Cd",
        "atomic_number" : 48,
        "atomic_weight" : 112.411,
        "melting_point K" : 594.1,
        "boiling_point K" : 1038,
        "atomic_radius pm" : 154,
        "covalent_radius pm" : 148,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 13.1,
        "fusion_heat (kJ/mol)" : 6.11,
        "evaporation_heat (kJ/mol)" : 59.1,
        "pauling_negativity" : 1.69,
        "first_ionizing kJ/mol" : 867.2,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 2.980
    },
    "Indium" : {
        "symbol" : "In",
        "atomic_number" : 49,
        "atomic_weight" : 114.818,
        "melting_point K" : 429.32,
        "boiling_point K" : 2353,
        "atomic_radius pm" : 166,
        "covalent_radius pm" : 144,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 15.7,
        "fusion_heat (kJ/mol)" : 3.24,
        "evaporation_heat (kJ/mol)" : 225.1,
        "pauling_negativity" : 1.78,
        "first_ionizing kJ/mol" : 558.0,
        "lattice_structure" : "TET",
        "lattice_constant ang" : 4.590
    },
    "Tin" : {
        "symbol" : "Sn",
        "atomic_number" : 50,
        "atomic_weight" : 118.71,
        "melting_point K" : 505.1,
        "boiling_point K" : 2543,
        "atomic_radius pm" : 162,
        "covalent_radius pm" : 141,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 16.3,
        "fusion_heat (kJ/mol)" : 7.07,
        "evaporation_heat (kJ/mol)" : 296,
        "pauling_negativity" : 1.96,
        "first_ionizing kJ/mol" : 708.2,
        "lattice_structure" : "TET",
        "lattice_constant ang" : 5.820
    },
    "Antimony" : {
        "symbol" : "Sb",
        "atomic_number" : 51,
        "atomic_weight" : 121.760,
        "melting_point K" : 903.9,
        "boiling_point K" : 1908,
        "atomic_radius pm" : 159,
        "covalent_radius pm" : 140,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 18.4,
        "fusion_heat (kJ/mol)" : 20.08,
        "evaporation_heat (kJ/mol)" : 195.2,
        "pauling_negativity" : 2.05,
        "first_ionizing kJ/mol" : 833.3,
        "lattice_structure" : "RHL",
        "lattice_constant ang" : 4.510
    },
    "Tellurium" : {
        "symbol" : "Te",
        "atomic_number" : 52,
        "atomic_weight" : 127.6,
        "melting_point K" : 722.7,
        "boiling_point K" : 1263,
        "atomic_radius pm" : 160,
        "covalent_radius pm" : 136,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 20.5,
        "fusion_heat (kJ/mol)" : 17.91,
        "evaporation_heat (kJ/mol)" : 49.8,
        "pauling_negativity" : 2.1,
        "first_ionizing kJ/mol" : 869.0,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 4.450
    },
    "Iodine" : {
        "symbol" : "I",
        "atomic_number" : 53,
        "atomic_weight" : 126.90447,
        "melting_point K" : 386.7,
        "boiling_point K" : 457.5,
        "atomic_radius pm" : "-",
        "covalent_radius pm" : 133,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 25.7,
        "fusion_heat (kJ/mol)" : "15.52 (I-I)",
        "evaporation_heat (kJ/mol)" : "41.95 (I-I)",
        "pauling_negativity" : 2.66,
        "first_ionizing kJ/mol" : 1008.3,
        "lattice_structure" : "ORC",
        "lattice_constant ang" : 7.720
    },
    "Xenon" : {
        "symbol" : "Xe",
        "atomic_number" : 54,
        "atomic_weight" : 131.29,
        "melting_point K" : 161.3,
        "boiling_point K" : 166.1,
        "atomic_radius pm" : "-",
        "covalent_radius pm" : 131,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 42.9,
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : 12.65,
        "pauling_negativity" : 0.0,
        "first_ionizing kJ/mol" : 1170.0,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 6.200
    },
    "Cesium" : {
        "symbol" : "Cs",
        "atomic_number" : 55,
        "atomic_weight" : 132.90543,
        "melting_point K" : 301.6,
        "boiling_point K" : 951.6,
        "atomic_radius pm" : 267,
        "covalent_radius pm" : 235,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 70.0,
        "fusion_heat (kJ/mol)" : 2.09,
        "evaporation_heat (kJ/mol)" : 68.3,
        "pauling_negativity" : 0.79,
        "first_ionizing kJ/mol" : 375.5,
        "lattice_structure" : "BCC",
        "lattice_constant ang" : 6.050
    },
    "Barium" : {
        "symbol" : "Ba",
        "atomic_number" : 56,
        "atomic_weight" : 137.327,
        "melting_point K" : 1002,
        "boiling_point K" : 1910,
        "atomic_radius pm" : 222,
        "covalent_radius pm" : 198,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 39.0,
        "fusion_heat (kJ/mol)" : 7.66,
        "evaporation_heat (kJ/mol)" : 142.0,
        "pauling_negativity" : 0.89,
        "first_ionizing kJ/mol" : 502.5,
        "lattice_structure" : "BCC",
        "lattice_constant ang" : 5.020
    },
    "Lanthanum" : {
        "symbol" : "La",
        "atomic_number" : 57,
        "atomic_weight" : 138.9055,
        "melting_point K" : 1194,
        "boiling_point K" : 3730,
        "atomic_radius pm" : 187,
        "covalent_radius pm" : 169,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 22.5,
        "fusion_heat (kJ/mol)" : 8.5,
        "evaporation_heat (kJ/mol)" : 402,
        "pauling_negativity" : 1.10,
        "first_ionizing kJ/mol" : 541.1,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 3.750
    },
    "Cerium" : {
        "symbol" : "Ce",
        "atomic_number" : 58,
        "atomic_weight" : 140.115,
        "melting_point K" : 1072,
        "boiling_point K" : 3699,
        "atomic_radius pm" : 181,
        "covalent_radius pm" : 165,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 21.0,
        "fusion_heat (kJ/mol)" : 5.2,
        "evaporation_heat (kJ/mol)" : 398,
        "pauling_negativity" : 1.12,
        "first_ionizing kJ/mol" : 540.1,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 5.160
    },
    "Praseodymium" : {
        "symbol" : "Pr",
        "atomic_number" : 59,
        "atomic_weight" : 140.90765,
        "melting_point K" : 1204,
        "boiling_point K" : 3785,
        "atomic_radius pm" : 182,
        "covalent_radius pm" : 165,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 20.8,
        "fusion_heat (kJ/mol)" : 11.3,
        "evaporation_heat (kJ/mol)" : 331,
        "pauling_negativity" : 1.13,
        "first_ionizing kJ/mol" : 526.6,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 3.670
    },
    "Neodymium" : {
        "symbol" : "Nd",
        "atomic_number" : 60,
        "atomic_weight" : 144.24,
        "melting_point K" : 1294,
        "boiling_point K" : 3341,
        "atomic_radius pm" : 182,
        "covalent_radius pm" : 184,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 20.6,
        "fusion_heat (kJ/mol)" : 7.1,
        "evaporation_heat (kJ/mol)" : 289,
        "pauling_negativity" : 1.14,
        "first_ionizing kJ/mol" : 531.5,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 3.660
    },
    "Promethium" : {
        "symbol" : "Pm",
        "atomic_number" : 61,
        "atomic_weight" : 144.9127,
        "melting_point K" : 1441,
        "boiling_point K" : 3000,
        "atomic_radius pm" : "-",
        "covalent_radius pm" : 163,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "-",
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : "-",
        "pauling_negativity" : 0.0,
        "first_ionizing kJ/mol" : 536,
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Samarium" : {
        "symbol" : "Sm",
        "atomic_number" : 62,
        "atomic_weight" : 150.36,
        "melting_point K" : 1350,
        "boiling_point K" : 2064,
        "atomic_radius pm" : 181,
        "covalent_radius pm" : 162,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 19.9,
        "fusion_heat (kJ/mol)" : 8.9,
        "evaporation_heat (kJ/mol)" : 165,
        "pauling_negativity" : 1.17,
        "first_ionizing kJ/mol" : 540.1,
        "lattice_structure" : "RHL",
        "lattice_constant ang" : 9.000
    },
    "Europium" : {
        "symbol" : "Eu",
        "atomic_number" : 63,
        "atomic_weight" : 151.965,
        "melting_point K" : 1095,
        "boiling_point K" : 1870,
        "atomic_radius pm" : 199,
        "covalent_radius pm" : 185,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 28.9,
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : 176,
        "pauling_negativity" : 0.0,
        "first_ionizing kJ/mol" : 546.9,
        "lattice_structure" : "BCC",
        "lattice_constant ang" : 4.610
    },
    "Gadolinium" : {
        "symbol" : "Gd",
        "atomic_number" : 64,
        "atomic_weight" : 157.25,
        "melting_point K" : 1586,
        "boiling_point K" : 3539,
        "atomic_radius pm" : 179,
        "covalent_radius pm" : 161,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 19.9,
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : 398,
        "pauling_negativity" : 1.20,
        "first_ionizing kJ/mol" : 594.2,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 3.640
    },
    "Terbium" : {
        "symbol" : "Tb",
        "atomic_number" : 65,
        "atomic_weight" : 158.92534,
        "melting_point K" : 1629,
        "boiling_point K" : 3296,
        "atomic_radius pm" : 180,
        "covalent_radius pm" : 159,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 19.2,
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : 389,
        "pauling_negativity" : 1.2,
        "first_ionizing kJ/mol" : 569,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 3.600
    },
    "Dysprosium" : {
        "symbol" : "Dy",
        "atomic_number" : 66,
        "atomic_weight" : 162.50,
        "melting_point K" : 1685,
        "boiling_point K" : 2835,
        "atomic_radius pm" : 180,
        "covalent_radius pm" : 159,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 19.0,
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : 291,
        "pauling_negativity" : "-",
        "first_ionizing kJ/mol" : 567,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 3.590
    },
    "Holmium" : {
        "symbol" : "Ho",
        "atomic_number" : 67,
        "atomic_weight" : 164.93032,
        "melting_point K" : 1747,
        "boiling_point K" : 2968,
        "atomic_radius pm" : 179,
        "covalent_radius pm" : 158,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 18.7,
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : 301,
        "pauling_negativity" : 1.23,
        "first_ionizing kJ/mol" : 574,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 3.580
    },
    "Erbium" : {
        "symbol" : "Er",
        "atomic_number" : 68,
        "atomic_weight" : 167.26,
        "melting_point K" : 1802,
        "boiling_point K" : 3136,
        "atomic_radius pm" : 178,
        "covalent_radius pm" : 157,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 18.4,
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : 317,
        "pauling_negativity" : 1.24,
        "first_ionizing kJ/mol" : 581,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 3.560
    },
    "Thulium" : {
        "symbol" : "Tm",
        "atomic_number" : 69,
        "atomic_weight" : 168.93421,
        "melting_point K" : 1818,
        "boiling_point K" : 2220,
        "atomic_radius pm" : 177,
        "covalent_radius pm" : 156,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 18.1,
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : 232,
        "pauling_negativity" : 1.25,
        "first_ionizing kJ/mol" : 589,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 3.540
    },
    "Ytterbium" : {
        "symbol" : "Yb",
        "atomic_number" : 70,
        "atomic_weight" : 173.04,
        "melting_point K" : 1097,
        "boiling_point K" : 1466,
        "atomic_radius pm" : 194,
        "covalent_radius pm" : "-",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 24.8,
        "fusion_heat (kJ/mol)" : 3.35,
        "evaporation_heat (kJ/mol)" : 159,
        "pauling_negativity" : 1.1,
        "first_ionizing kJ/mol" : 603,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 5.490
    },
    "Lutetium" : {
        "symbol" : "Lu",
        "atomic_number" : 71,
        "atomic_weight" : 174.967,
        "melting_point K" : 1936,
        "boiling_point K" : 3668,
        "atomic_radius pm" : 175,
        "covalent_radius pm" : 156,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 17.8,
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : 414,
        "pauling_negativity" : 1.27,
        "first_ionizing kJ/mol" : 513,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 3.510
    },
    "Hafnium" : {
        "symbol" : "Hf",
        "atomic_number" : 72,
        "atomic_weight" : 178.49,
        "melting_point K" : 2503,
        "boiling_point K" : 5470,
        "atomic_radius pm" : 167,
        "covalent_radius pm" : 144,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 13.6,
        "fusion_heat (kJ/mol)" : "(25.1)",
        "evaporation_heat (kJ/mol)" : 575,
        "pauling_negativity" : 1.3,
        "first_ionizing kJ/mol" : 575.2,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 3.200
    },
    "Tantalum" : {
        "symbol" : "Ta",
        "atomic_number" : 73,
        "atomic_weight" : 180.9479,
        "melting_point K" : 3269,
        "boiling_point K" : 5698,
        "atomic_radius pm" : 149,
        "covalent_radius pm" : 134,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 10.9,
        "fusion_heat (kJ/mol)" : 24.7,
        "evaporation_heat (kJ/mol)" : 758,
        "pauling_negativity" : 1.5,
        "first_ionizing kJ/mol" : 760.1,
        "lattice_structure" : "BCC",
        "lattice_constant ang" : 3.310
    },
    "Tungsten" : {
        "symbol" : "W",
        "atomic_number" : 74,
        "atomic_weight" : 183.84,
        "melting_point K" : 3680,
        "boiling_point K" : 5930,
        "atomic_radius pm" : 141,
        "covalent_radius pm" : 130,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 9.53,
        "fusion_heat (kJ/mol)" : "(35)",
        "evaporation_heat (kJ/mol)" : 824,
        "pauling_negativity" : 1.7,
        "first_ionizing kJ/mol" : 769.7,
        "lattice_structure" : "BCC",
        "lattice_constant ang" : 3.160
    },
    "Rhenium" : {
        "symbol" : "Re",
        "atomic_number" : 75,
        "atomic_weight" : 186.207,
        "melting_point K" : 3453,
        "boiling_point K" : 5900,
        "atomic_radius pm" : 137,
        "covalent_radius pm" : 128,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 8.85,
        "fusion_heat (kJ/mol)" : 34,
        "evaporation_heat (kJ/mol)" : 704,
        "pauling_negativity" : 1.9,
        "first_ionizing kJ/mol" : 759.1,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 2.760
    },
    "Osmium" : {
        "symbol" : "Os",
        "atomic_number" : 76,
        "atomic_weight" : 190.23,
        "melting_point K" : 3327,
        "boiling_point K" : 5300,
        "atomic_radius pm" : 135,
        "covalent_radius pm" : 126,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 8.43,
        "fusion_heat (kJ/mol)" : 31.7,
        "evaporation_heat (kJ/mol)" : 738,
        "pauling_negativity" : 2.2,
        "first_ionizing kJ/mol" : 819.8,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 2.740
    },
    "Iridium" : {
        "symbol" : "Ir",
        "atomic_number" : 77,
        "atomic_weight" : 192.22,
        "melting_point K" : 2683,
        "boiling_point K" : 4403,
        "atomic_radius pm" : 136,
        "covalent_radius pm" : 127,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 8.54,
        "fusion_heat (kJ/mol)" : 27.61,
        "evaporation_heat (kJ/mol)" : 604,
        "pauling_negativity" : 2.20,
        "first_ionizing kJ/mol" : 868.1,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 3.840
    },
    "Platinum" : {
        "symbol" : "Pt",
        "atomic_number" : 78,
        "atomic_weight" : 195.08,
        "melting_point K" : 2045,
        "boiling_point K" : 4100,
        "atomic_radius pm" : 139,
        "covalent_radius pm" : 130,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 9.10,
        "fusion_heat (kJ/mol)" : 21.76,
        "evaporation_heat (kJ/mol)" : "~470",
        "pauling_negativity" : 2.28,
        "first_ionizing kJ/mol" : 868.1,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 3.920
    },
    "Gold" : {
        "symbol" : "Au",
        "atomic_number" : 79,
        "atomic_weight" : 196.96654,
        "melting_point K" : 1337.58,
        "boiling_point K" : 3080,
        "atomic_radius pm" : 146,
        "covalent_radius pm" : 134,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 10.2,
        "fusion_heat (kJ/mol)" : 12.68,
        "evaporation_heat (kJ/mol)" : "~340",
        "pauling_negativity" : 2.54,
        "first_ionizing kJ/mol" : 889.3,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 4.080
    },
    "Mercury" : {
        "symbol" : "Hg",
        "atomic_number" : 80,
        "atomic_weight" : 200.59,
        "melting_point K" : 234.28,
        "boiling_point K" : 629.73,
        "atomic_radius pm" : 157,
        "covalent_radius pm" : 149,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 14.8,
        "fusion_heat (kJ/mol)" : 2.295,
        "evaporation_heat (kJ/mol)" : 58.5,
        "pauling_negativity" : 2.00,
        "first_ionizing kJ/mol" : 1006.0,
        "lattice_structure" : "RHL",
        "lattice_constant ang" : 2.990
    },
    "Thallium" : {
        "symbol" : "Tl",
        "atomic_number" : 81,
        "atomic_weight" : 204.3833,
        "melting_point K" : 576.6,
        "boiling_point K" : 1730,
        "atomic_radius pm" : 171,
        "covalent_radius pm" : 148,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 17.2,
        "fusion_heat (kJ/mol)" : 4.31,
        "evaporation_heat (kJ/mol)" : 162.4,
        "pauling_negativity" : 1.62,
        "first_ionizing kJ/mol" : 588.9,
        "lattice_structure" : "HEX",
        "lattice_constant ang" : 3.460
    },
    "Lead" : {
        "symbol" : "Pb",
        "atomic_number" : 82,
        "atomic_weight" : 207.2,
        "melting_point K" : 600.65,
        "boiling_point K" : 2013,
        "atomic_radius pm" : 175,
        "covalent_radius pm" : 147,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 18.3,
        "fusion_heat (kJ/mol)" : 4.77,
        "evaporation_heat (kJ/mol)" : 177.8,
        "pauling_negativity" : 1.8,
        "first_ionizing kJ/mol" : 715.2,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 4.950
    },
    "Bismuth" : {
        "symbol" : "Bi",
        "atomic_number" : 83,
        "atomic_weight" : 208.98037,
        "melting_point K" : 544.5,
        "boiling_point K" : 1883,
        "atomic_radius pm" : 170,
        "covalent_radius pm" : 146,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 21.3,
        "fusion_heat (kJ/mol)" : 11.00,
        "evaporation_heat (kJ/mol)" : 172.0,
        "pauling_negativity" : 2.02,
        "first_ionizing kJ/mol" : 702.9,
        "lattice_structure" : "RHL",
        "lattice_constant ang" : 4.750
    },
    "Polonium" : {
        "symbol" : "Po",
        "atomic_number" : 84,
        "atomic_weight" : 208.9824,
        "melting_point K" : 527,
        "boiling_point K" : 1235,
        "atomic_radius pm" : 176,
        "covalent_radius pm" : 146,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 22.7,
        "fusion_heat (kJ/mol)" : "(10)",
        "evaporation_heat (kJ/mol)" : "(102.9)",
        "pauling_negativity" : 2.0,
        "first_ionizing kJ/mol" : 813.1,
        "lattice_structure" : "SC",
        "lattice_constant ang" : 3.350
    },
    "Astatine" : {
        "symbol" : "At",
        "atomic_number" : 85,
        "atomic_weight" : 209.9871,
        "melting_point K" : 575,
        "boiling_point K" : 610,
        "atomic_radius pm" : "-",
        "covalent_radius pm" : "(145)",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "-",
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : "-",
        "pauling_negativity" : 2.2,
        "first_ionizing kJ/mol" : 916.3,
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Radon" : {
        "symbol" : "Rn",
        "atomic_number" : 86,
        "atomic_weight" : 222.0176,
        "melting_point K" : 202,
        "boiling_point K" : 211.4,
        "atomic_radius pm" : "-",
        "covalent_radius pm" : "-",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "-",
        "fusion_heat (kJ/mol)" : "-",
        "evaporation_heat (kJ/mol)" : 18.1,
        "pauling_negativity" : "-",
        "first_ionizing kJ/mol" : 1036.5,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : "n/a"
    },
    "Francium" : {
        "symbol" : "Fr",
        "atomic_number" : 87,
        "atomic_weight" : 223.0197,
        "melting_point K" : 300,
        "boiling_point K" : 950,
        "atomic_radius pm" : "-",
        "covalent_radius pm" : "-",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "-",
        "fusion_heat (kJ/mol)" : 15,
        "evaporation_heat (kJ/mol)" : "-",
        "pauling_negativity" : 0.7,
        "first_ionizing kJ/mol" : "~375",
        "lattice_structure" : "BCC",
        "lattice_constant ang" : "n/a"
    },
    "Radium" : {
        "symbol" : "Ra",
        "atomic_number" : 88,
        "atomic_weight" : 226.0254,
        "melting_point K" : 973,
        "boiling_point K" : 1413,
        "atomic_radius pm" : "-",
        "covalent_radius pm" : "-",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 45.0,
        "fusion_heat (kJ/mol)" : "(9.6)",
        "evaporation_heat (kJ/mol)" : "(113)",
        "pauling_negativity" : 0.9,
        "first_ionizing kJ/mol" : 509.0,
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Actinium" : {
        "symbol" : "Ac",
        "atomic_number" : 89,
        "atomic_weight" : 227.0278,
        "melting_point K" : 1320,
        "boiling_point K" : 3470,
        "atomic_radius pm" : 188,
        "covalent_radius pm" : "-",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 22.54,
        "fusion_heat (kJ/mol)" : "(10.5)",
        "evaporation_heat (kJ/mol)" : "(292.9)",
        "pauling_negativity" : 1.1,
        "first_ionizing kJ/mol" : 665.5,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 5.310
    },
    "Thorium" : {
        "symbol" : "Th",
        "atomic_number" : 90,
        "atomic_weight" : 232.0381,
        "melting_point K" : 2028,
        "boiling_point K" : 5060,
        "atomic_radius pm" : 180,
        "covalent_radius pm" : 165,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 19.8,
        "fusion_heat (kJ/mol)" : 16.11,
        "evaporation_heat (kJ/mol)" : 513.7,
        "pauling_negativity" : 1.3,
        "first_ionizing kJ/mol" : 670.4,
        "lattice_structure" : "FCC",
        "lattice_constant ang" : 5.080
    },
    "Protactinium" : {
        "symbol" : "Pa",
        "atomic_number" : 91,
        "atomic_weight" : 231.03588,
        "melting_point K" : 2113,
        "boiling_point K" : 4300,
        "atomic_radius pm" : 161,
        "covalent_radius pm" : "-",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 15.0,
        "fusion_heat (kJ/mol)" : 16.7,
        "evaporation_heat (kJ/mol)" : 481.2,
        "pauling_negativity" : 1.5,
        "first_ionizing kJ/mol" : "n/a",
        "lattice_structure" : "TET",
        "lattice_constant ang" : 3.920
    },
    "Uranium" : {
        "symbol" : "U",
        "atomic_number" : 92,
        "atomic_weight" : 238.0289,
        "melting_point K" : 1405.5,
        "boiling_point K" : 4018,
        "atomic_radius pm" : 138,
        "covalent_radius pm" : 142,
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 12.5,
        "fusion_heat (kJ/mol)" : 12.6,
        "evaporation_heat (kJ/mol)" : 417,
        "pauling_negativity" : 1.38,
        "first_ionizing kJ/mol" : 686.4,
        "lattice_structure" : "ORC",
        "lattice_constant ang" : 2.850
    },
    "Neptunium" : {
        "symbol" : "Np",
        "atomic_number" : 93,
        "atomic_weight" : 237.048,
        "melting_point K" : 913,
        "boiling_point K" : 4175,
        "atomic_radius pm" : 130,
        "covalent_radius pm" : "-",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 21.1,
        "fusion_heat (kJ/mol)" : "(9.6)",
        "evaporation_heat (kJ/mol)" : 336,
        "pauling_negativity" : 1.36,
        "first_ionizing kJ/mol" : "n/a",
        "lattice_structure" : "ORC",
        "lattice_constant ang" : 4.720
    },
    "Plutonium" : {
        "symbol" : "Pu",
        "atomic_number" : 94,
        "atomic_weight" : 244.0642,
        "melting_point K" : 914,
        "boiling_point K" : 3505,
        "atomic_radius pm" : 151,
        "covalent_radius pm" : "-",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "-",
        "fusion_heat (kJ/mol)" : 2.8,
        "evaporation_heat (kJ/mol)" : 343.5,
        "pauling_negativity" : 1.28,
        "first_ionizing kJ/mol" : 491.9,
        "lattice_structure" : "MCL",
        "lattice_constant ang" : "n/a"
    },
    "Americium" : {
        "symbol" : "Am",
        "atomic_number" : 95,
        "atomic_weight" : 243.0614,
        "melting_point K" : 1267,
        "boiling_point K" : 2880,
        "atomic_radius pm" : 173,
        "covalent_radius pm" : "-",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 20.8,
        "fusion_heat (kJ/mol)" : "(10.0)",
        "evaporation_heat (kJ/mol)" : 238.5,
        "pauling_negativity" : 1.3,
        "first_ionizing kJ/mol" : "n/a",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Curium" : {
        "symbol" : "Cm",
        "atomic_number" : 96,
        "atomic_weight" : 247.0703,
        "melting_point K" : 1340,
        "boiling_point K" : "n/a",
        "atomic_radius pm" : 299,
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : 18.28,
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : 1.3,
        "first_ionizing kJ/mol" : "(580)",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/A"
    },
    "Berkelium" : {
        "symbol" : "Bk",
        "atomic_number" : 97,
        "atomic_weight" : 247.0703,
        "melting_point K" : "n/a",
        "boiling_point K" : "n/a",
        "atomic_radius pm" : 297,
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : 1.3,
        "first_ionizing kJ/mol" : "(600)",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Californium" : {
        "symbol" : "Cf",
        "atomic_number" : 98,
        "atomic_weight" : 251.0796,
        "melting_point K" : 900,
        "boiling_point K" : "n/a",
        "atomic_radius pm" : 295,
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : 1.3,
        "first_ionizing kJ/mol" : "(610)",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Einsteinium" : {
        "symbol" : "Es",
        "atomic_number" : 99,
        "atomic_weight" : 252.083,
        "melting_point K" : "n/a",
        "boiling_point K" : 1130,
        "atomic_radius pm" : 292,
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : 1.3,
        "first_ionizing kJ/mol" : "(620)",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Fermium" : {
        "symbol" : "Fm",
        "atomic_number" : 100,
        "atomic_weight" : 257.0951,
        "melting_point K" : 1800,
        "boiling_point K" : "n/a",
        "atomic_radius pm" : 290,
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : 1.3,
        "first_ionizing kJ/mol" : "(630)",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Mendelevium" : {
        "symbol" : "Md",
        "atomic_number" : 101,
        "atomic_weight" : 258.1,
        "melting_point K" : 1100,
        "boiling_point K" : "n/a",
        "atomic_radius pm" : 287,
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : 1.3,
        "first_ionizing kJ/mol" : "(635)",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Nobelium" : {
        "symbol" : "No",
        "atomic_number" : 102,
        "atomic_weight" : 259.1009,
        "melting_point K" : 1100,
        "boiling_point K" : "n/a",
        "atomic_radius pm" : 285,
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : 1.3,
        "first_ionizing kJ/mol" : "(640)",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Lawrencium" : {
        "symbol" : "Lr",
        "atomic_number" : 103,
        "atomic_weight" : 262.11,
        "melting_point K" : "n/a",
        "boiling_point K" : "n/a",
        "atomic_radius pm" : 282,
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : "n/a",
        "first_ionizing kJ/mol" : "n/a",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Rutherfordium" : {
        "symbol" : "Rf",
        "atomic_number" : 104,
        "atomic_weight" : "[261]",
        "melting_point K" : "n/a",
        "boiling_point K" : "n/a",
        "atomic_radius pm" : "n/a",
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : "n/a",
        "first_ionizing kJ/mol" : "n/a",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Dubnium" : {
        "symbol" : "Db",
        "atomic_number" : 105,
        "atomic_weight" : "[262]",
        "melting_point K" : "n/a",
        "boiling_point K" : "n/a",
        "atomic_radius pm" : "n/a",
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : "n/a",
        "first_ionizing kJ/mol" : "n/a",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Seaborgium" : {
        "symbol" : "Sg",
        "atomic_number" : 106,
        "atomic_weight" : "[266]",
        "melting_point K" : "n/a",
        "boiling_point K" : "n/a",
        "atomic_radius pm" : "n/a",
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : "n/a",
        "first_ionizing kJ/mol" : "n/a",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Bohrium" : {
        "symbol" : "Bh",
        "atomic_number" : 107,
        "atomic_weight" : "[264]",
        "melting_point K" : "n/a",
        "boiling_point K" : "n/a",
        "atomic_radius pm" : "n/a",
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : "n/a",
        "first_ionizing kJ/mol" : "n/a",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Hassium" : {
        "symbol" : "Hs",
        "atomic_number" : 108,
        "atomic_weight" : "[269]",
        "melting_point K" : "n/a",
        "boiling_point K" : "n/a",
        "atomic_radius pm" : "n/a",
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : "n/a",
        "first_ionizing kJ/mol" : "n/a",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Meitnerium" : {
        "symbol" : "Mt",
        "atomic_number" : 109,
        "atomic_weight" : "[268]",
        "melting_point K" : "n/a",
        "boiling_point K" : "n/a",
        "atomic_radius pm" : "n/a",
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : "n/a",
        "first_ionizing kJ/mol" : "n/a",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Ununnilium" : {
        "symbol" : "Uun",
        "atomic_number" : 110,
        "atomic_weight" : "[269]",
        "melting_point K" : "n/a",
        "boiling_point K" : "n/a",
        "atomic_radius pm" : "n/a",
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : "n/a",
        "first_ionizing kJ/mol" : "n/a",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Unununium" : {
        "symbol" : "Uuu",
        "atomic_number" : 111,
        "atomic_weight" : "[272]",
        "melting_point K" : "n/a",
        "boiling_point K" : "n/a",
        "atomic_radius pm" : "n/a",
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : "n/a",
        "first_ionizing kJ/mol" : "n/a",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Ununbium" : {
        "symbol" : "Uub",
        "atomic_number" : 112,
        "atomic_weight" : "[277]",
        "melting_point K" : "n/a",
        "boiling_point K" : "n/a",
        "atomic_radius pm" : "n/a",
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : "n/a",
        "first_ionizing kJ/mol" : "n/a",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Ununtrium" : {
        "symbol" : "Uut",
        "atomic_number" : 113,
        "atomic_weight" : "n/a",
        "melting_point K" : "n/a",
        "boiling_point K" : "n/a",
        "atomic_radius pm" : "n/a",
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : "n/a",
        "first_ionizing kJ/mol" : "n/a",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Ununquadium" : {
        "symbol" : "Uuq",
        "atomic_number" : 114,
        "atomic_weight" : "[289]",
        "melting_point K" : "n/a",
        "boiling_point K" : "n/a",
        "atomic_radius pm" : "n/a",
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : "n/a",
        "first_ionizing kJ/mol" : "n/a",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Ununpentium" : {
        "symbol" : "Uup",
        "atomic_number" : 115,
        "atomic_weight" : "n/a",
        "melting_point K" : "n/a",
        "boiling_point K" : "n/a",
        "atomic_radius pm" : "n/a",
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : "n/a",
        "first_ionizing kJ/mol" : "n/a",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Ununhexium" : {
        "symbol" : "Uuh",
        "atomic_number" : 116,
        "atomic_weight" : "n/a",
        "melting_point K" : "n/a",
        "boiling_point K" : "n/a",
        "atomic_radius pm" : "n/a",
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : "n/a",
        "first_ionizing kJ/mol" : "n/a",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Ununseptium" : {
        "symbol" : "Uus",
        "atomic_number" : 117,
        "atomic_weight" : "n/a",
        "melting_point K" : "n/a",
        "boiling_point K" : "n/a",
        "atomic_radius pm" : "n/a",
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : "n/a",
        "first_ionizing kJ/mol" : "n/a",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    },
    "Ununoctium" : {
        "symbol" : "Uuo",
        "atomic_number" : 118,
        "atomic_weight" : "n/a",
        "melting_point K" : "n/a",
        "boiling_point K" : "n/a",
        "atomic_radius pm" : "n/a",
        "covalent_radius pm" : "n/a",
        "ionic_radius pm" : "",
        "atomic_volume cm3/mol" : "n/a",
        "fusion_heat (kJ/mol)" : "n/a",
        "evaporation_heat (kJ/mol)" : "n/a",
        "pauling_negativity" : "n/a",
        "first_ionizing kJ/mol" : "n/a",
        "lattice_structure" : "n/a",
        "lattice_constant ang" : "n/a"
    }
}