Technical data for Samarium

Overview
NameSamarium
SymbolSm
Atomic Number62
Atomic Weight150.36
Density7.353 g/cm3
Melting Point1072 °C
Boiling Point1803 °C

Thermal properties
PhaseSolid
Melting Point1072 °C
Boiling Point1803 °C
Absolute Melting Point1345 K
Absolute Boiling Point2076 K
Heat of Fusion8.6 kJ/mol
Heat of Vaporization175 kJ/mol
Heat of CombustionN/A
Specific Heat196 J/(kg K)[note]
Thermal Conductivity13 W/(m K)
Thermal Expansion0.0000127 K-1

Bulk physical properties
Density7.353 g/cm3
Density (Liquid)7.16 g/cm3
Molar Volume0.000020449
Brinell Hardness441 MPa
Vickers Hardness412 MPa
Bulk Modulus38 GPa
Shear Modulus20 GPa
Young Modulus50 GPa
Poisson Ratio0.27
Speed of Sound2130 m/s
Thermal Conductivity13 W/(m K)
Thermal Expansion0.0000127 K-1

Reactivity
Valence3
Electronegativity1.17
ElectronAffinity50 kJ/mol
Ionization Energies
544.5, 1070, 2260, 3990 kJ/mol

Health and Safety
Autoignition Point150 °C
FlashpointN/A

Classifications
Alternate NamesNone
Nams of AllotropesNone
Blockf
GroupN/A
Period6
Electron Configuration[Xe]4f66s2
ColorSilver
Discovery
1879 in France
Gas phaseN/A
CAS NumberCAS7440-19-9

Electrical properties
Electrical TypeConductor
Electrical Conductivity1.1×106 S/m
Resistivity9.4×10-7 m Ω
Superconducting PointN/A

Magnetic properties
Magnetic TypeParamagnetic
Mass Magnetic Susceptibility1.11×10-7
Molar Magnetic Susceptibility1.669×10-8
Volume Magnetic Susceptibility0.00081618

Abundances
% in Universe5×10-7%
% in Sun1×10-7%
% in Meteorites0.000017%
% in Earth's Crust0.0006%
% in Oceans4.5×10-11%
% in HumansN/A

Atomic dimensions and structure
Atomic Radius238 pm
Covalent RadiusN/A
Van der Waals RadiusN/A
Crystal StructureSimple Trigonal
Lattice Angles
π/2, π/2, 2 π/3
Lattice Constants
362.1, 362.1, 2625 pm
Space Group NameR_ 3m
Space Group Number166

Nuclear Properties
Half-LifeStable
LifetimeStable
Stable Isotopes
144Sm, 149Sm, 150Sm, 152Sm, 154Sm
Isotopic Abundances
144Sm3.07%
147Sm14.99%
148Sm11.24%
149Sm13.82%
150Sm7.38%
152Sm26.75%
154Sm22.75%

Notes on the properties of Samarium:
Specific Heat: Value given for solid phase.