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Formula: Er
Form: Foil (Light Tight)
Material: Erbium
CAS Number: 7440-52-0
Commodity: Metals
Purity: 99%
Temper: As Rolled
Light Tight: Light Tight
Hazard Pictogram: GHS02
Erbium Foil (Light Tight) is a foil product from Goodfellow's extensive range of metals and alloys. This erbium foil is characterized by its light blocking abilities due to its opaque nature across visible and infrared wavelengths. With a density of 9.066 g/cm3, it also possesses high thermal and electrical conductivity. Erbium foil finds use in optical filters where blocking specific wavelengths is necessary. It is also implemented as a coating material for enhancing thermionic emission in cathode tubes. At Goodfellow, you can find erbium foil in various dimensions and forms tailored to your application.
Technical Data Sheet Safety Data Sheet Tolerance Properties

Flammable

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Material Properties for Metals

Atomic Properties
Element Value
Atomic number 68
Crystal structure Hexagonal close packed
Electronic structure Xe 4f¹² 6s²
Valences shown 3
Atomic weight( amu ) 167.26
Thermal neutron absorption cross-section( Barns ) 160
Natural isotope distribution( Mass No./% ) 166/ 33.4
Natural isotope distribution( Mass No./% ) 162/ 0.1
Natural isotope distribution( Mass No./% ) 168/ 27.0
Natural isotope distribution( Mass No./% ) 170/ 15.0
Natural isotope distribution( Mass No./% ) 167/ 22.9
Natural isotope distribution( Mass No./% ) 164/ 1.6
Atomic radius - Goldschmidt( nm ) 0.175
Ionisation potential( No./eV ) 2/ 11.93
Ionisation potential( No./eV ) 1/ 6.10
Mechanical Properties
Element Value
Material condition Polycrystalline
Poisson's ratio 0.207
Bulk modulus( GPa ) 41.8
Tensile modulus( GPa ) 73.3
Hardness - Vickers( kgf mm⁻² ) 70
Tensile strength( MPa ) 292
Yield strength( MPa ) 292
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 86@20@20°C
Temperature coefficient( K⁻¹ ) 0.00201@0-100°C
Physical Properties
Element Value
Boiling point( C ) 2863
Density( gcm⁻³ ) 9.051@20°C
Thermal Properties
Element Value
Melting point( C ) 1529
Latent heat of evaporation( J g⁻¹ ) 1680
Latent heat of fusion( J g⁻¹ ) 103
Specific heat( J K⁻¹ kg⁻¹ ) 168@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 14.5@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 9.2@0-100°C

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