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Europium ( Eu )

Material Information

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General Description:  

Discovered by E.A. Demarçay in 1901 in Paris, France.

The most reactive member of the lanthanide group of elements and one of the less abundant (2.1 ppm in the Earth's crust), europium is a ductile silvery metal which reacts rapidly with air and water. As a result of its reactive nature, the metal has limited applications, but some is used in the manufacture of thin-film superconductor alloys. Europium is also used as control rod material in nuclear reactors due to its ability to absorb neutrons.

   

Atomic Properties

Atomic number 63
Atomic radius - Goldschmidt ( nm ) 0.204
Atomic weight ( amu ) 151.96
Crystal structure Body centred cubic
Electronic structure Xe 4f7 6s2
Ionization potential No. eV
1 5.67
2 11.25
Natural isotope distribution Mass No. %
151 47.8
153 52.2
Photo-electric work function ( eV ) 2.5
Thermal neutron absorption cross-section ( Barns ) 4100
Valences shown 2, 3

Electrical Properties

Electrical resistivity @25C ( µOhmcm ) 90.0
Temperature coefficient @0-100C ( K-1 ) 0.0048

Mechanical Properties

Material condition Polycrystalline
Bulk modulus ( GPa ) 12.1
Hardness - Vickers 20
Poisson's ratio 0.286
Tensile modulus ( GPa ) 14.7

Physical Properties

Boiling point ( C ) 1597
Density @25C ( g cm-3 ) 5.243
Melting point ( C ) 822

Thermal Properties

Coefficient of thermal expansion @0-100C ( x10-6 K-1 ) 32.0
Latent heat of evaporation ( J g-1 ) 1155
Latent heat of fusion ( J g-1 ) 63.4
Specific heat @25C ( J K-1 kg-1 ) 176
Thermal conductivity @0-100C ( W m-1 K-1 ) 13.9
All information and technical data are given as a guide only. Although every effort has been made to ensure that the information is correct, no warranty is given as to its completeness or accuracy.

Buy Europium on-line

Standard products are available in these forms
Foil Powder Sputtering Target Wire
Foil Powder Sputtering Target Wire

Choose a form to search our on-line catalog  

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