Àdàkọ:Infobox neodymium

Neodymium, ₆₀Nd
Neodymium
Pípè	/ˌniːoʊˈdɪmiəm/ (NEE-oh-DIM-ee-əm)
Ìhànsójú	silvery white
Ìwúwo átọ̀mù Ar, std(Nd)	144.242(3)
Neodymium ní orí tábìlì àyè
	praseodymium ← neodymium → promethium
Nọ́mbà átọ̀mù (Z)	60
Ẹgbẹ́	group n/a
Àyè	àyè 6
Àdìpọ̀	Àdìpọ̀-f
Ẹ̀ka ẹ́límẹ́ntì	Lanthanide
Ìtò ẹ̀lẹ́ktrọ́nù	[Xe] 4f4 6s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 18, 22, 8, 2
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	1297 K (1024 °C, 1875 °F)
Ígbà ìhó	3347 K (3074 °C, 5565 °F)
Kíki (near r.t.)	7.01 g/cm3
when liquid (at m.p.)	6.89 g/cm3
Heat of fusion	7.14 kJ/mol
Heat of	289 kJ/mol
Molar heat capacity	27.45 J/(mol·K)
Atomic properties
Oxidation states	0, +2, +3, +4 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: 1.14
Atomic radius	empirical: 181 pm
Covalent radius	201±6 pm
	Color lines in a spectral rangeSpectral lines of neodymium
Other properties
Natural occurrence	primordial
Crystal structure	hexagonal
Speed of sound thin rod	2330 m/s (at 20 °C)
Thermal expansion	(r.t.) (α, poly) 9.6 µm/(m·K)
Thermal conductivity	16.5 W/(m·K)
Electrical resistivity	(r.t.) (α, poly) 643 n Ω·m
Magnetic ordering	paramagnetic, antiferromagnetic below 20K
Young's modulus	(α form) 41.4 GPa
Shear modulus	(α form) 16.3 GPa
Bulk modulus	(α form) 31.8 GPa
Poisson ratio	(α form) 0.281
Vickers hardness	343 MPa
Brinell hardness	265 MPa
CAS Number	7440-00-8
Main isotopes of neodymium
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References

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↑ Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. doi:10.1515/pac-2015-0305.
↑ Yttrium and all lanthanides except Ce, Pm, Eu, Tm, Yb have been observed in the oxidation state 0 in bis(1,3,5-tri-t-butylbenzene) complexes, see Cloke, F. Geoffrey N. (1993). "Zero Oxidation State Compounds of Scandium, Yttrium, and the Lanthanides". Chem. Soc. Rev. 22: 17–24. doi:10.1039/CS9932200017.
↑ Gschneidner, K.A., and Eyring, L., Handbook on the Physics and Chemistry of Rare Earths, North Holland Publishing Co., Amsterdam, 1978.

[CIAAW2013-1] Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. doi:10.1515/pac-2015-0305.

[Cloke1993-2] Yttrium and all lanthanides except Ce, Pm, Eu, Tm, Yb have been observed in the oxidation state 0 in bis(1,3,5-tri-t-butylbenzene) complexes, see Cloke, F. Geoffrey N. (1993). "Zero Oxidation State Compounds of Scandium, Yttrium, and the Lanthanides". Chem. Soc. Rev. 22: 17–24. doi:10.1039/CS9932200017.

[3] Gschneidner, K.A., and Eyring, L., Handbook on the Physics and Chemistry of Rare Earths, North Holland Publishing Co., Amsterdam, 1978.

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