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| Atomic Number | 65 |
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| Atomic Symbol | Tb |
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| Atomic Weight | 158.92534 amu |
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| Group | Rare Earth (Lanthanide Series) |
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| Form | Solid |
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| Density @ STP | 8.23 g/cm3 |
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| Melting Point | 1356 °C (1356 °F, 2472.8 °K) |
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| Boiling Point | 3230 °C (5846 °F, 3503.15 °K) |
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| Heat of Fusion | 10.15 kJ/mol |
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| Heat of Vaporization | 295 kJ/mol |
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| First Ionization Potential | 5.8639 eV |
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| Specific Heat Capacity | 0.182 J/g K |
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| Ground State Electron Configuration | 4f9 5s2 5p6 6s2 |
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| Oxidation States | +3 |
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| Stable Isotopes and Natural Abundance on Earth | 159Tb, 100% |
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| Selected Radioisotopes | 149Tb |
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| Atomic Radius | 225 pm |
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| Crystal Structure | Hexagonal |
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| Discovered by | Mosander, 1843 |
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