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Technical data for Samarium

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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
Critical PressureN/A
Critical TemperatureN/A
Heat of Fusion8.6 kJ/mol
Heat of Vaporization175 kJ/mol
Heat of CombustionN/A
Specific Heat196 J/(kg K)[note]
Adiabatic IndexN/A
Neel Point106 K
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
Mohs HardnessN/A
Vickers Hardness412 MPa
Bulk Modulus38 GPa
Shear Modulus20 GPa
Young Modulus50 GPa
Poisson Ratio0.27
Refractive IndexN/A
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
Heat of CombustionN/A
DOT Hazard Class4.1
DOT Numbers1325
EU NumberN/A
NFPA Fire Rating1
NFPA HazardsN/A
NFPA Health Rating1
NFPA Reactivity Rating1
RTECS NumberN/A
NFPA LabelNFPA Label

Classifications
Alternate NamesNone
Names of AllotropesNone
Blockf
GroupN/A
Period6
Electron Configuration[Xe]4f66s2
ColorSilver
Discovery
1879 in France
Gas phaseN/A
CAS NumberCAS7440-19-9
CID NumberCID23951
Gmelin NumberN/A
NSC NumberN/A
RTECS NumberN/A

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

Magnetic properties
Magnetic TypeParamagnetic
Curie PointN/A
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
Decay ModeN/A
Quantum Numbers7F0
Neutron Cross Section5.9×103
Neutron Mass Absorption4.7
Known Isotopes
128Sm, 129Sm, 130Sm, 131Sm, 132Sm, 133Sm, 134Sm, 135Sm, 136Sm, 137Sm, 138Sm, 139Sm, 140Sm, 141Sm, 142Sm, 143Sm, 144Sm, 145Sm, 146Sm, 147Sm, 148Sm, 149Sm, 150Sm, 151Sm, 152Sm, 153Sm, 154Sm, 155Sm, 156Sm, 157Sm, 158Sm, 159Sm, 160Sm, 161Sm, 162Sm, 163Sm, 164Sm, 165Sm
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.

Up to date, curated data provided by
Mathematica's ElementData function from Wolfram Research, Inc.

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