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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
Erbium Foil (Light Tight) is a precision-engineered thin sheet of high-purity erbium specifically manufactured to eliminate pinholes, ensuring complete opacity to external light. This property is critical for optical experiments and device fabrication where uncontrolled light transmission must be prevented. Erbium’s distinct 1.54 μm emission, combined with its high corrosion resistance and stability in air, makes it a vital material in photonics, optoelectronics, and advanced laser systems. The light-tight foil format is particularly advantageous for vacuum deposition processes, photonic shielding layers, and the controlled production of erbium-based coatings. In telecommunications, it supports the fabrication of erbium-doped optical amplifiers, while in research it serves as a high-integrity barrier and source material for thin-film integration. By uniting erbium’s exceptional optical properties with an impervious physical barrier, Erbium Foil (Light Tight) plays a critical role in high-precision optical engineering and advanced photonics research.
Flammable
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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