Plantilya:Infobox samarium

Samarium
62Sm
- ↑ Sm ↓ Pu Periodic table promethium ← samarium → europium
Panagway
silvery white
Kinatibuk-ang mga kinaiya
Ngalan, simbolo, kaiphan	samarium, Sm, 62
Paglitok	/səˈmɛəriəm/ [[Help:Pronunciation respelling key|sə-Plantilya:Smallcaps all-ee-əm]]
Kategoriyang elemento	puthaw nga lantanido
Group, period, block	[[group {{{group}}} element|{{{group}}}]], 6, f
Gibug-aton sa atomo	150.36
Kontorno sa elektron	[Xe] 6s2 4f6 2, 8, 18, 24, 8, 2 Electron shells of samarium (2, 8, 18, 24, 8, 2)
History
Pagkadiskobre	Lecoq de Boisbaudran (1879)
First isolation	Lecoq de Boisbaudran (1879)
Physical properties
Phase	magahi
Density (near r.t.)	7.52 g·cm−3
Liquid density at m.p.	7.16 g·cm−3
Melting point	1345 K, 1072 °C, 1962 °F
Boiling point	2067 K, 1794 °C, 3261 °F
Heat of fusion	8.62 kJ·mol−1
Heat of vaporization	165 kJ·mol−1
Molar heat capacity	29.54 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1001 1106 1240 (1421) (1675) (2061)
Atomic properties
Oxidation states	4, 3, 2, 1 (mildly basic oxide)
Electronegativity	1.17 (Pauling scale)
Ionization energies	1st: 544.5 kJ·mol−1
	2nd: 1070 kJ·mol−1
	3rd: 2260 kJ·mol−1
Atomic radius	180 pm
Covalent radius	198±8 pm
Miscellanea
Crystal structure	rhombohedral
Magnetic ordering	paramagnetic
Electrical resistivity	(r.t.) (α, poly) 0.940 µΩ·m
Thermal conductivity	13.3 W·m−1·K−1
Thermal expansion	(r.t.) (α, poly) 12.7 µm/(m·K)
Speed of sound (thin rod)	(20 °C) 2130 m·s−1
Young's modulus	(α form) 49.7 GPa
Shear modulus	(α form) 19.5 GPa
Bulk modulus	(α form) 37.8 GPa
Poisson ratio	(α form) 0.274
Vickers hardness	412 MPa
Brinell hardness	441 MPa
CAS registry number	7440-19-9
Most stable isotopes
Main article: Isotopes of samarium
iso NA half-life DM DE (MeV) DP 144Sm 3.07% 144Sm is stable with 82 neutrons 145Sm syn 340 d ε - 145Pm 146Sm trace 1.03×108 y α 2.529 142Nd 147Sm 14.99% 1.06×1011 y α 2.310 143Nd 148Sm 11.24% 7×1015 y α 1.986 144Nd 149Sm 13.82% >2×1015 y α 1.870 145Nd 150Sm 7.38% 150Sm is stable with 88 neutrons 151Sm syn 90 y β− - 151Eu 152Sm 26.75% 152Sm is stable with 90 neutrons 153Sm syn 46.284 h β− - 153Eu 154Sm 22.75% >2.3×1018 y β−β− 1.2510 154Gd