HHomeBackground Color:He
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KCaEuropium Isotope DataScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBaLaCePrNdPmSmEuGdTbDyHoErTmYbLuHfTaWReOsIrPtAuHgTlPbBiPoAtRn
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Technical data for Europium

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Overview
NameEuropium
SymbolEu
Atomic Number63
Atomic Weight151.964
Density5.244 g/cm3
Melting Point822 °C
Boiling Point1527 °C

Thermal properties
PhaseSolid
Melting Point822 °C
Boiling Point1527 °C
Absolute Melting Point1095 K
Absolute Boiling Point1.8×103 K
Critical PressureN/A
Critical TemperatureN/A
Heat of Fusion9.2 kJ/mol
Heat of Vaporization175 kJ/mol
Heat of CombustionN/A
Specific Heat182 J/(kg K)[note]
Adiabatic IndexN/A
Neel Point90.5 K
Thermal Conductivity14 W/(m K)
Thermal Expansion0.000035 K-1

Bulk physical properties
Density5.244 g/cm3
Density (Liquid)5.13 g/cm3
Molar Volume0.000028979
Brinell HardnessN/A
Mohs HardnessN/A
Vickers Hardness167 MPa
Bulk Modulus8.3 GPa
Shear Modulus7.9 GPa
Young Modulus18 GPa
Poisson Ratio0.15
Refractive IndexN/A
Speed of SoundN/A
Thermal Conductivity14 W/(m K)
Thermal Expansion0.000035 K-1

Reactivity
Valence3
ElectronegativityN/A
ElectronAffinity50 kJ/mol
Ionization Energies
547.1, 1085, 2404, 4120 kJ/mol

Health and Safety
Autoignition PointN/A
FlashpointN/A
Heat of CombustionN/A
DOT Hazard ClassN/A
DOT NumbersN/A
EU NumberN/A
NFPA Fire RatingN/A
NFPA HazardsN/A
NFPA Health RatingN/A
NFPA Reactivity RatingN/A
RTECS NumberN/A
NFPA LabelN/A

Classifications
Alternate NamesNone
Names of AllotropesNone
Blockf
GroupN/A
Period6
Electron Configuration[Xe]4f76s2
ColorSilver
Discovery
1901 in France
Gas phaseN/A
CAS NumberCAS7440-53-1
CID NumberCID23981
Gmelin NumberN/A
NSC NumberN/A
RTECS NumberN/A

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

Magnetic properties
Magnetic TypeParamagnetic
Curie PointN/A
Mass Magnetic Susceptibility2.76×10-7
Molar Magnetic Susceptibility4.1942×10-8
Volume Magnetic Susceptibility0.0014473

Abundances
% in Universe5×10-8%
% in Sun5×10-8%
% in Meteorites5.9×10-6%
% in Earth's Crust0.00018%
% in Oceans1.3×10-11%
% in HumansN/A

Atomic dimensions and structure
Atomic Radius231 pm
Covalent RadiusN/A
Van der Waals RadiusN/A
Crystal StructureBody Centered Cubic
Lattice Angles
π/2, π/2, π/2
Lattice Constants
458.1, 458.1, 458.1 pm
Space Group NameIm_ 3m
Space Group Number229

Nuclear Properties
Half-LifeStable
LifetimeStable
Decay ModeN/A
Quantum Numbers8S7/2
Neutron Cross Section4450
Neutron Mass Absorption0.6
Known Isotopes
130Eu, 131Eu, 132Eu, 133Eu, 134Eu, 135Eu, 136Eu, 137Eu, 138Eu, 139Eu, 140Eu, 141Eu, 142Eu, 143Eu, 144Eu, 145Eu, 146Eu, 147Eu, 148Eu, 149Eu, 150Eu, 151Eu, 152Eu, 153Eu, 154Eu, 155Eu, 156Eu, 157Eu, 158Eu, 159Eu, 160Eu, 161Eu, 162Eu, 163Eu, 164Eu, 165Eu, 166Eu, 167Eu
Stable Isotopes
151Eu, 153Eu
Isotopic Abundances
151Eu47.81%
153Eu52.19%


Notes on the properties of Europium:

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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