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Formula: Tm
Form: Disk
Material: Thulium
CAS Number: 7440-30-4
Commodity: Metals
Purity: 99%
Temper: As Rolled
Thickness: 0.15mm
Diameter: 12.7mm
Hazard Pictogram: GHS02
Thulium disks are part of our collection of rare earth metal products. With high density, ductility and unique magnetic properties, they has niche applications in research labs exploring quantum computing materials and advanced laser systems. Thulium disks enable materials scientists to test thin film coatings and alloy compositions relevant to cutting-edge computing and optics R&D.
Technical Data Sheet Safety Data Sheet Tolerance Properties

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Tolerances

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

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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