Technical data for Europium

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
Heat of Fusion9.2 kJ/mol
Heat of Vaporization175 kJ/mol
Heat of CombustionN/A
Specific Heat182 J/(kg K)[note]
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
Vickers Hardness167 MPa
Bulk Modulus8.3 GPa
Shear Modulus7.9 GPa
Young Modulus18 GPa
Poisson Ratio0.15
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

Classifications
Alternate NamesNone
Nams of AllotropesNone
Blockf
GroupN/A
Period6
Electron Configuration[Xe]4f76s2
ColorSilver
Discovery
1901 in France
Gas phaseN/A
CAS NumberCAS7440-53-1

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

Magnetic properties
Magnetic TypeParamagnetic
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
Stable Isotopes
151Eu, 153Eu
Isotopic Abundances
151Eu47.81%
153Eu52.19%

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