Neodymyo

Ang neodymyo (Iningles neodymium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Nd ug kaiphan nga atomik 60. Ang neodymyo mao ang puthaw nga lantanido.

Neodymium
60Nd
- ↑ Nd ↓ U Periodic table praseodymium ← neodymium → promethium
Panagway
silvery white
Kinatibuk-ang mga kinaiya
Ngalan, simbolo, kaiphan	neodymium, Nd, 60
Paglitok	/ˌniː.oʊˈdɪmiəm/ [[Help:Pronunciation respelling key|Plantilya:Smallcaps all-o-Plantilya:Smallcaps all-ee-əm]]
Kategoriyang elemento	puthaw nga lantanido
Group, period, block	[[group {{{group}}} element|{{{group}}}]], 6, f
Gibug-aton sa atomo	144.242
Kontorno sa elektron	[Xe] 4f4 6s2 2, 8, 18, 22, 8, 2 Electron shells of neodymium (2, 8, 18, 22, 8, 2)
History
Pagkadiskobre	Carl Auer von Welsbach (1885)
Physical properties
Phase	magahi
Density (near r.t.)	7.01 g·cm−3
Liquid density at m.p.	6.89 g·cm−3
Melting point	1297 K, 1024 °C, 1875 °F
Boiling point	3347 K, 3074 °C, 5565 °F
Heat of fusion	7.14 kJ·mol−1
Heat of vaporization	289 kJ·mol−1
Molar heat capacity	27.45 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1595 1774 1998 (2296) (2715) (3336)
Atomic properties
Oxidation states	3, 2, 1 (mildly basic oxide)
Electronegativity	1.14 (Pauling scale)
Ionization energies	1st: 533.1 kJ·mol−1
	2nd: 1040 kJ·mol−1
	3rd: 2130 kJ·mol−1
Atomic radius	181 pm
Covalent radius	201±6 pm
Miscellanea
Crystal structure	hexagonal
Magnetic ordering	paramagnetic, antiferromagnetic below 20 K[1]
Electrical resistivity	(r.t.) (α, poly) 643 nΩ·m
Thermal conductivity	16.5 W·m−1·K−1
Thermal expansion	(r.t.) (α, poly) 9.6 µm/(m·K)
Speed of sound (thin rod)	(20 °C) 2330 m·s−1
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 registry number	7440-00-8
Most stable isotopes
Main article: Isotopes of neodymium
iso NA half-life DM DE (MeV) DP 142Nd 27.2% 142Nd is stable with 82 neutrons 143Nd 12.2% 143Nd is stable with 83 neutrons 144Nd 23.8% 2.29×1015 y α 1.905 140Ce 145Nd 8.3% >6×1016 y α 1.5784 141Ce 146Nd 17.2% 146Nd is stable with 86 neutrons 148Nd 5.7% >3.0×1018 y α 0.5986 144Ce β−β− 1.9288 148Sm 150Nd 5.6% 6.7×1018 y β−β− 3.367 150Sm
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