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Europium (63Eu151.965)
[7440-53-1]

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Elemental Form

Europium is a silvery-white rare earth belonging to the lanthanide group. The metal's hardness is comparable to lead and it is very ductile. Europium, the most reactive of the rare earth metals, quickly oxidizes in air and resembles calcium in its reactions with water.
Melting Point822°CBoiling Point1596°C
Density5.244g/cm3Specific Heat @ 25°C0.039cal/g°C
Heat of Fusion2.2k-cal/g-atomHeat of Vaporization42k-cal/g-atom
Atomic Volume28.9W/DFirst Ionization Energy131K-cal/g-mole
Covalent Radius1.85AngstromsElectrical Resistivity @ 298°C91.0µΩ-cm
Crystal StructureCubic, body centeredCompressibility8.29x10-6cm2/kg
Thermal Neutron Cross Section4600barns/atomMagnetic Moment7.12Bohr magnetons
Magnetic Susceptibility33,100x10-6emu/moleStandard Electrode Potential+2.2volts