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| Terbium |
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| Pípè | /ˈtɜːrbiəm/ (TUR-bee-əm) |
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| Ìhànsójú | silvery white |
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| Ìwúwo átọ̀mù Ar, std(Tb) | 158.925354(8)[1] |
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| Terbium ní orí tábìlì àyè |
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|
| Nọ́mbà átọ̀mù (Z) | 65 |
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| Ẹgbẹ́ | group n/a |
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| Àyè | àyè 6 |
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| Àdìpọ̀ | Àdìpọ̀-f |
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| Ẹ̀ka ẹ́límẹ́ntì | Lanthanide |
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| Ìtò ẹ̀lẹ́ktrọ́nù | [Xe] 4f9 6s2 |
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| Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 18, 27, 8, 2 |
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| Àwọn ohun ìní ara |
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| Ìfarahàn at STP | solid |
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| Ìgbà ìyọ́ | 1629 K (1356 °C, 2473 °F) |
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| Ígbà ìhó | 3503 K (3230 °C, 5846 °F) |
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| Kíki (near r.t.) | 8.23 g/cm3 |
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| when liquid (at m.p.) | 7.65 g/cm3 |
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| Heat of fusion | 10.15 kJ/mol |
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| Heat of | 293 kJ/mol |
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| Molar heat capacity | 28.91 J/(mol·K) |
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pressure| P (Pa) | 1 | 10 | 100 | 1 k | 10 k | 100 k |
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| at T (K) | 1789 | 1979 | (2201) | (2505) | (2913) | (3491) |
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|
| Atomic properties |
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| Oxidation states | 0,[2] +1, +2, +3, +4 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
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| Electronegativity | Pauling scale: ? 1.2 |
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| Atomic radius | empirical: 177 pm |
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| Covalent radius | 194±5 pm |
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 Color lines in a spectral rangeSpectral lines of terbium |
| Other properties |
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| Natural occurrence | primordial |
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| Crystal structure | hexagonal |
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| Speed of sound thin rod | 2620 m/s (at 20 °C) |
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| Thermal expansion | (r.t.) (α, poly) 10.3 µm/(m·K) |
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| Thermal conductivity | 11.1 W/(m·K) |
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| Electrical resistivity | (r.t.) (α, poly) 1.150 µ Ω·m |
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| Magnetic ordering | paramagnetic at 300 K |
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| Young's modulus | (α form) 55.7 GPa |
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| Shear modulus | (α form) 22.1 GPa |
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| Bulk modulus | (α form) 38.7 GPa |
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| Poisson ratio | (α form) 0.261 |
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| Vickers hardness | 863 MPa |
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| Brinell hardness | 677 MPa |
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| CAS Number | 7440-27-9 |
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| Main isotopes of terbium |
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| Isotope | Abundance | Half-life (t1/2) | Decay mode | Product |
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| 157Tb | syn | 71 y | ε | 0.060 | 157Gd | | 158Tb | syn | 180 y | ε | 1.220 | 158Gd | | β− | 0.937 | 158Dy | | 159Tb | 100% | 159Tb is stable with 94 neutrons |
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| references |
