Osmium Powder

Osmium powder is a highly dense, ductile metal powder. Available in 6 variations, it can be customized to meet the needs of many applications. The hardness and wear resistance of Osmium Powder means it is commonly used for electrical contacts and instrument pivot bearings. Its high density also allows it to be used as ballast for aircraft control and instrument gyroscopes. Osmium Powder’s properties make it ideal for the precision engineering of small components where high density is required.

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Tolerance

Properties

Reference & Citations

Flammable

Corrosive

Health hazard/Hazardous to the ozone layer

each

Tolerances

Powder

Mean Particle Size		Nominal
Minimum Particle Size		Nominal
Maximum Particle Size		Nominal
Maximum Particle Size		Nominal
Particle Size D10		Nominal
Particle Size D50		Nominal
Particle Size D90		Nominal

Material Properties for Metals

Atomic Properties

Element	Value
Atomic number	76
Crystal structure	Hexagonal close packed
Electronic structure	Xe 4f¹⁴ 5d⁶ 6s²
Valences shown	0, 1, 2, 3, 4, 5, 6, 7, 8
Atomic weight( amu )	190.2
Thermal neutron absorption cross-section( Barns )	15.3
Photo-electric work function( eV )	4.8
Natural isotope distribution( Mass No./% )	192/ 41.0
Natural isotope distribution( Mass No./% )	184/ 0.02
Natural isotope distribution( Mass No./% )	187/ 1.6
Natural isotope distribution( Mass No./% )	189/ 16.1
Natural isotope distribution( Mass No./% )	186/ 1.58
Natural isotope distribution( Mass No./% )	188/ 13.3
Natural isotope distribution( Mass No./% )	190/ 26.4
Atomic radius - Goldschmidt( nm )	0.135
Ionisation potential( No./eV )	Feb-16
Ionisation potential( No./eV )	1/ 8.7

Mechanical Properties

Element	Value
Material condition	Soft
Material condition	Hard
Poisson's ratio	0.25
Poisson's ratio	0.25
Bulk modulus( GPa )	373
Bulk modulus( GPa )	373
Tensile modulus( GPa )	559
Tensile modulus( GPa )	559
Hardness - Vickers( kgf mm⁻² )	300-350
Hardness - Vickers( kgf mm⁻² )	670-1000

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	8.8@20@20°C
Superconductivity critical temperature( K )	0.66
Temperature coefficient( K⁻¹ )	0.0041@0-100°C

Physical Properties

Element	Value
Boiling point( C )	5027
Density( gcm⁻³ )	22.5@20°C

Thermal Properties

Element	Value
Melting point( C )	3045
Latent heat of evaporation( J g⁻¹ )	3305
Latent heat of fusion( J g⁻¹ )	154
Specific heat( J K⁻¹ kg⁻¹ )	131@25
Thermal conductivity( W m⁻¹ K⁻¹ )	87.6@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	4.57@0-100