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Formula: Ho
Form: Disk
Material: Holmium
CAS Number: 7440-60-0
Commodity: Metals
Purity: 99%
Temper: As Rolled
Hazard Pictogram: GHS02
Holmium disks are precision-engineered disks available in a wide selection of 424 diameters, thicknesses and finishes. These high-performance disks offer unique magnetic and optical properties ideal for scientific instrumentation, including spectrometers, lasers and magnetometers. Their industrial applications range from advanced optics to microelectronics fabrication. With unparalleled quality in a wide choice of sizes and compositions, our Holmium disks enable cutting-edge research and manufacturing.
Technical Data Sheet Safety Data Sheet Tolerance Properties

Flammable

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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 67
Crystal structure Hexagonal close packed
Electronic structure Xe 4f¹¹ 6s²
Valences shown 3
Atomic weight( amu ) 164.9304
Thermal neutron absorption cross-section( Barns ) 65
Atomic radius - Goldschmidt( nm ) 0.176
Ionisation potential( No./eV ) 2/ 11.80
Ionisation potential( No./eV ) 1/ 6.02
Mechanical Properties
Element Value
Material condition Polycrystalline
Poisson's ratio 0.225
Bulk modulus( GPa ) 40.5
Tensile modulus( GPa ) 66.9
Hardness - Vickers( kgf mm⁻² ) 60
Tensile strength( MPa ) 262
Yield strength( MPa ) 221
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 94@20@20°C
Temperature coefficient( K⁻¹ ) 0.00171@0-100°C
Physical Properties
Element Value
Boiling point( C ) 2695
Density( gcm⁻³ ) 8.803@20°C
Thermal Properties
Element Value
Melting point( C ) 1474
Latent heat of evaporation( J g⁻¹ ) 1695
Latent heat of fusion( J g⁻¹ ) 104
Specific heat( J K⁻¹ kg⁻¹ ) 165@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 16.2@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 9.5@0-400°C

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