Holmium Foil (Light Tight)

Holmium Foil (Light Tight) offers the distinct advantages of holmium’s rare-earth magnetic and optical properties in a defect-free sheet form, ensuring total opacity to light and eliminating pinhole transmission. This makes it highly suited for environments requiring both structural metallic integrity and controlled optical or electromagnetic shielding. Its strong absorption bands in the visible and infrared ranges, combined with its high magnetic moment, make it useful across photonics, electronics, and advanced sensing applications. Industries such as optoelectronics, spectroscopy, and laser technology employ holmium foil for calibration standards, optical filters, and shielding elements in high-sensitivity detection systems. Specific applications include its role in holmium-doped optical fibers for Raman spectrum filtering, thin-foil integration into fiber lasers optimized for resonant cladding pumping, and as a surface modifier in nanostructures to enhance photoluminescent emission. Research has shown that holmium coatings improve UV absorption in ZnO nanostructures, while holmium-doped glasses provide enhanced emission in green lighting technologies. In both industrial and research contexts, Holmium Foil (Light Tight) is a crucial material for achieving precision optical control and reliable electromagnetic shielding.

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Properties

Reference & Citations

Flammable

each

Material Properties for Metals

Atomic Properties

Element	Value
Atomic number	67
Crystal structure	Hexagonal close packed
Electronic structure	Xe 4f¹¹ 6s²
Valences shown	3
Atomic weight( amu )	164.9304
Thermal neutron absorption cross-section( Barns )	65
Atomic radius - Goldschmidt( nm )	0.176
Ionisation potential( No./eV )	2/ 11.80
Ionisation potential( No./eV )	1/ 6.02

Mechanical Properties

Element	Value
Material condition	Polycrystalline
Poisson's ratio	0.225
Bulk modulus( GPa )	40.5
Tensile modulus( GPa )	66.9
Hardness - Vickers( kgf mm⁻² )	60
Tensile strength( MPa )	262
Yield strength( MPa )	221

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	94@20@20°C
Temperature coefficient( K⁻¹ )	0.00171@0-100°C

Physical Properties

Element	Value
Boiling point( C )	2695
Density( gcm⁻³ )	8.803@20°C

Thermal Properties

Element	Value
Melting point( C )	1474
Latent heat of evaporation( J g⁻¹ )	1695
Latent heat of fusion( J g⁻¹ )	104
Specific heat( J K⁻¹ kg⁻¹ )	165@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	16.2@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	9.5@0-400°C