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Formula: Tm
Form: Pellet/Lump
Material: Thulium
CAS Number: 7440-30-4
Commodity: Metals
Purity: 99.7%
Maximum Lump Size: 25mm
Hazard Pictogram: GHS02
Goodfellow offers thulium pellets as part of their extensive range of metal products. Thulium is a silvery-gray rare earth metal that is soft, malleable, and ductile. It has a high heat resistance and is paramagnetic at room temperature. Thulium pellets can be used in research applications to study the properties of rare earth metals. They also have uses in alloys, such as thulium-yttrium-aluminum garnets which have applications in lasers. Thulium's unique properties make it an interesting material for both scientific study and industrial uses.
Technical Data Sheet Safety Data Sheet Tolerance Properties

Flammable

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Tolerances

Pellet/Lump
Maximum Lump Size Nominal

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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