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Formula: Tm
Form: Foil/Film/Sheet
Material: Thulium
CAS Number: 7440-30-4
Commodity: Metals
Purity: 99%
Temper: As Rolled
Thulium Foil is an ultra-thin metal foil produced by Goodfellow. These foils showcase the malleability of thulium while maintaining the lustrous silvery-gray appearance of this rare earth metal. Offered in 12 variations, our thulium foils enable research and development across numerous high-tech applications, including semiconductor and laser technologies, where the metal's unique magnetic, electrical and optical properties are leveraged. Thulium's corrosion resistance also makes this foil well-suited for advanced material studies exploring everything from superconductivity to hydrogen storage.
Technical Data Sheet Safety Data Sheet Tolerance Properties
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Tolerances

Foil/Film/Sheet
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

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