Thulium Foil (Light Tight)

Thulium Foil Light Tight combines the optical and magnetic properties of thulium with complete light-blocking capability, making it ideal for environments where light exclusion is critical. Its unique optical emissions in the near-infrared and blue ranges allow for specialized use in photonics while the light-tight characteristic ensures precision in sensitive optical and laser systems. Industries such as defense optics, precision metrology, and high-resolution imaging employ this foil in optical isolation layers, light-blocking barriers for instrumentation, and protective enclosures for laser components. Specific applications include IR calibration systems, beam-shaping modules, and photonic experiments requiring strict light control. This combination of functional material properties and physical light exclusion makes it highly valuable in both industrial manufacturing and cutting-edge research contexts.

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Properties

Reference & Citations

Flammable

each

Material Properties for Metals

Atomic Properties

Element	Value
Atomic number	69
Crystal structure	Hexagonal close packed
Electronic structure	Xe 4f¹³ 6s²
Valences shown	2,3
Atomic weight( amu )	168.9342
Thermal neutron absorption cross-section( Barns )	115
Atomic radius - Goldschmidt( nm )	0.174
Ionisation potential( No./eV )	1/ 6.18
Ionisation potential( No./eV )	3/ 23.71
Ionisation potential( No./eV )	2/ 12.05

Mechanical Properties

Element	Value
Hardness - Brinell	53
Material condition	Polycrystalline
Poisson's ratio	0.235
Bulk modulus( GPa )	40.5
Tensile modulus( GPa )	76

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	90@20@20°C
Temperature coefficient( K⁻¹ )	0.00195@0-100°C

Physical Properties

Element	Value
Boiling point( C )	1947
Density( gcm⁻³ )	9.322@25°C

Thermal Properties

Element	Value
Melting point( C )	1545
Latent heat of evaporation( J g⁻¹ )	1456
Latent heat of fusion( J g⁻¹ )	109
Specific heat( J K⁻¹ kg⁻¹ )	160@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	16.9@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	11.6@0-400°C