Erbium Foil (Light Tight)

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.

Formula: Er
Percentage Purity: 99%
Temper: As Rolled
Thickness: 1mm
Length 1: 25mm
Length 2: 25mm
CAS Number: 7440-52-0
UOM Code: 758-562-25
Legacy Code: ER000280
Distributor Code: GF75856225

SKU: 1000077148

Product Code: ER00-FL-000180

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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