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Thulium |
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Pípè | /ˈθjuːliəm/ (THEW-lee-əm) |
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Ìhànsójú | silvery gray |
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Ìwúwo átọ̀mù Ar, std(Tm) | 168.934218(6)[1] |
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Thulium ní orí tábìlì àyè |
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|
Nọ́mbà átọ̀mù (Z) | 69 |
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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] 4f13 6s2 |
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Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 18, 31, 8, 2 |
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Àwọn ohun ìní ara |
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Ìfarahàn at STP | solid |
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Ìgbà ìyọ́ | 1818 K (1545 °C, 2813 °F) |
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Ígbà ìhó | 2223 K (1950 °C, 3542 °F) |
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Kíki (near r.t.) | 9.32 g/cm3 |
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when liquid (at m.p.) | 8.56 g/cm3 |
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Heat of fusion | 16.84 kJ/mol |
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Heat of | 247 kJ/mol |
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Molar heat capacity | 27.03 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)
|
1117
|
1235
|
1381
|
1570
|
(1821)
|
(2217)
|
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|
Atomic properties |
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Oxidation states | +2, +3 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
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Electronegativity | Pauling scale: 1.25 |
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Atomic radius | empirical: 176 pm |
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Covalent radius | 190±10 pm |
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Spectral lines of thulium |
Other properties |
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Natural occurrence | primordial |
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Crystal structure | hexagonal |
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Thermal expansion | (r.t.) (poly) 13.3 µm/(m·K) |
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Thermal conductivity | 16.9 W/(m·K) |
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Electrical resistivity | (r.t.) (poly) 676 n Ω·m |
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Magnetic ordering | paramagnetic at 300 K |
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Young's modulus | 74.0 GPa |
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Shear modulus | 30.5 GPa |
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Bulk modulus | 44.5 GPa |
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Poisson ratio | 0.213 |
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Vickers hardness | 520 MPa |
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Brinell hardness | 471 MPa |
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CAS Number | 7440-30-4 |
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Main isotopes of thulium |
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Àdàkọ:Category-inline | references |