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Gadolinium |
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Pípè | /ˌɡædəˈlɪniəm/ (GAD-ə-LIN-ee-əm) |
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Ìhànsójú | silvery white |
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Ìwúwo átọ̀mù Ar, std(Gd) | 157.25(3)[1] |
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Gadolinium ní orí tábìlì àyè |
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Nọ́mbà átọ̀mù (Z) | 64 |
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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] 4f7 5d1 6s2 |
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Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 18, 25, 9, 2 |
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Àwọn ohun ìní ara |
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Ìfarahàn at STP | solid |
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Ìgbà ìyọ́ | 1585 K (1312 °C, 2394 °F) |
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Ígbà ìhó | 3546 K (3273 °C, 5923 °F) |
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Kíki (near r.t.) | 7.90 g/cm3 |
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when liquid (at m.p.) | 7.4 g/cm3 |
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Heat of fusion | 10.05 kJ/mol |
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Heat of | 301.3 kJ/mol |
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Molar heat capacity | 37.03 J/(mol·K) |
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pressure (calculated)
P (Pa)
|
1
|
10
|
100
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1 k
|
10 k
|
100 k
|
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at T (K)
|
1836
|
2028
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2267
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2573
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2976
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3535
|
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Atomic properties |
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Oxidation states | 0,[2] +1, +2, +3 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
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Electronegativity | Pauling scale: 1.20 |
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Atomic radius | empirical: 180 pm |
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Covalent radius | 196±6 pm |
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Spectral lines of gadolinium |
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 | 2680 m/s (at 20 °C) |
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Thermal expansion | (100 °C) (α, poly) 9.4 µm/(m·K) |
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Thermal conductivity | 10.6 W/(m·K) |
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Electrical resistivity | (r.t.) (α, poly) 1.310 µ Ω·m |
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Magnetic ordering | ferromagnetic/paramagnetic transition at 292 K[3] |
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Young's modulus | (α form) 54.8 GPa |
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Shear modulus | (α form) 21.8 GPa |
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Bulk modulus | (α form) 37.9 GPa |
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Poisson ratio | (α form) 0.259 |
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Vickers hardness | 570 MPa |
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CAS Number | 7440-54-2 |
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Main isotopes of gadolinium |
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Àdàkọ:Category-inline | references |