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Neodymium |
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Pípè | /ˌniːoʊˈdɪmiəm/ (NEE-oh-DIM-ee-əm) |
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Ìhànsójú | silvery white |
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Ìwúwo átọ̀mù Ar, std(Nd) | 144.242(3)[1] |
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Neodymium ní orí tábìlì àyè |
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Nọ́mbà átọ̀mù (Z) | 60 |
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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] 4f4 6s2 |
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Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan | 2, 8, 18, 22, 8, 2 |
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Àwọn ohun ìní ara |
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Ìfarahàn at STP | solid |
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Ìgbà ìyọ́ | 1297 K (1024 °C, 1875 °F) |
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Ígbà ìhó | 3347 K (3074 °C, 5565 °F) |
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Kíki (near r.t.) | 7.01 g/cm3 |
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when liquid (at m.p.) | 6.89 g/cm3 |
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Heat of fusion | 7.14 kJ/mol |
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Heat of | 289 kJ/mol |
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Molar heat capacity | 27.45 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)
|
1595
|
1774
|
1998
|
(2296)
|
(2715)
|
(3336)
|
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|
Atomic properties |
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Oxidation states | 0,[2] +2, +3, +4 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment |
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Electronegativity | Pauling scale: 1.14 |
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Atomic radius | empirical: 181 pm |
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Covalent radius | 201±6 pm |
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Spectral lines of neodymium |
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 | 2330 m/s (at 20 °C) |
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Thermal expansion | (r.t.) (α, poly) 9.6 µm/(m·K) |
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Thermal conductivity | 16.5 W/(m·K) |
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Electrical resistivity | (r.t.) (α, poly) 643 n Ω·m |
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Magnetic ordering | paramagnetic, antiferromagnetic below 20K [3] |
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Young's modulus | (α form) 41.4 GPa |
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Shear modulus | (α form) 16.3 GPa |
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Bulk modulus | (α form) 31.8 GPa |
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Poisson ratio | (α form) 0.281 |
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Vickers hardness | 343 MPa |
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Brinell hardness | 265 MPa |
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CAS Number | 7440-00-8 |
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Main isotopes of neodymium |
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Àdàkọ:Category-inline | references |