Thulium Foil

Thulium Foil provides a thin, workable form of this rare earth metal, enabling its integration into layered devices, optical assemblies, and magnetic systems. Thulium is known for its sharp emission lines in the blue and near-infrared spectrum, making it essential in specialized lasers, phosphors, and photonic research. Industries including optoelectronics, defense, and medical equipment manufacturing use thulium foil in producing solid-state laser components, high-resolution optical filters, and luminescent materials for imaging systems. Specific applications include thin-film deposition for laser gain media, precision optical calibration targets, and dopant sources in glass or crystal growth. The foil format offers versatility for both experimental setups and high-specification production, ensuring a critical role in advancing optical and photonic technologies.

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Tolerance

Properties

Reference & Citations

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Tolerances

Foil

Thickness	<0.01mm	±25%
Thickness	0.01mm - 0.05mm	±15%
Thickness	>0.05mm	±10%

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