Àdàkọ:Infobox samarium

Samarium, ₆₂Sm

Samarium
Pípè	/səˈmɛəriəm/ ​(sə-MAIR-ee-əm)
Ìhànsójú	silvery white
Ìwúwo átọ̀mù Ar, std(Sm)	150.36(2)
Samarium ní orí tábìlì àyè
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson - ↑ Sm ↓ Pu promethium ← samarium → europium
Nọ́mbà átọ̀mù (Z)	62
Ẹgbẹ́	group n/a
Àyè	àyè 6
Àdìpọ̀	Àdìpọ̀-f
Ẹ̀ka ẹ́límẹ́ntì	Lanthanide
Ìtò ẹ̀lẹ́ktrọ́nù	[Xe] 4f6 6s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 18, 24, 8, 2
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	1345 K ​(1072 °C, ​1962 °F)
Ígbà ìhó	2067 K ​(1794 °C, ​3261 °F)
Kíki (near r.t.)	7.52 g/cm3
when liquid (at m.p.)	7.16 g/cm3
Heat of fusion	8.62 kJ/mol
Heat of	165 kJ/mol
Molar heat capacity	29.54 J/(mol·K)
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	0, +2, +3 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: 1.17
Atomic radius	empirical: 180 pm
Covalent radius	198±8 pm
Color lines in a spectral range Spectral lines of samarium
Other properties
Natural occurrence	primordial
Crystal structure	​rhombohedral
Speed of sound thin rod	2130 m/s (at 20 °C)
Thermal expansion	(r.t.) (α, poly) 12.7 µm/(m·K)
Thermal conductivity	13.3 W/(m·K)
Electrical resistivity	(r.t.) (α, poly) 0.940 µ Ω·m
Magnetic ordering	paramagnetic
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 Number	7440-19-9
Main isotopes of samarium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct 144Sm 3.07% 144Sm is stable with 82 neutrons 146Sm syn 1.03×108y α 2.529 142Nd 147Sm 14.99% 1.06×1011y α 2.310 143Nd 148Sm 11.24% 7×1015y α 1.986 144Nd 149Sm 13.82% >2×1015 y α 1.870 145Nd 150Sm 7.38% 150Sm is stable with 88 neutrons 152Sm 26.75% 152Sm is stable with 90 neutrons 154Sm 22.75% 154Sm is stable with 92 neutrons

References

This reference list does not appear in the article.