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Formula: Se
Form: Powder
Material: Selenium
CAS Number: 7782-49-2
Commodity: Metals
Purity: 99.95%
Max Particle Size: 250μm
Hazard Pictogram: GHS06, GHS08, GHS09
Selenium Powder is an elemental powder in the chalcogen group. It’s an intrinsic semiconductor with photoconductive properties, meaning its electrical conductivity increases under light. Selenium Powder has applications in photocells and solar cells as a photoconductor. Others include being used to color glass and ceramics red. We offer 20 variations of Selenium Powder to meet different application needs.
Technical Data Sheet Safety Data Sheet Tolerance Properties

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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 34
Crystal structure Hexagonal
Electronic structure Ar 3d¹⁰ 4s² 4p⁴
Valences shown -2,4,6
Atomic weight( amu ) 78.96
Thermal neutron absorption cross-section( Barns ) 12.2
Photo-electric work function( eV ) 5.9
Natural isotope distribution( Mass No./% ) 76/ 9.0
Natural isotope distribution( Mass No./% ) 82/ 9.2
Natural isotope distribution( Mass No./% ) 74/ 0.9
Natural isotope distribution( Mass No./% ) 80/ 49.8
Natural isotope distribution( Mass No./% ) 77/ 7.6
Natural isotope distribution( Mass No./% ) 78/ 23.5
Atomic radius - Goldschmidt( nm ) 0.116
Ionisation potential( No./eV ) 4/ 42.9
Ionisation potential( No./eV ) 6/ 81.7
Ionisation potential( No./eV ) 5/ 68.3
Ionisation potential( No./eV ) 1/ 9.75
Ionisation potential( No./eV ) 3/ 30.8
Ionisation potential( No./eV ) 2/ 21.2
Mechanical Properties
Element Value
Hardness - Mohs 2
Material condition Polycrystalline
Poisson's ratio 0.447
Bulk modulus( GPa ) 8.3
Tensile modulus( GPa ) 58
Electrical Properties
Element Value
Electrical resistivity( µOhmcm ) 12@20@20°C
Physical Properties
Element Value
Boiling point( C ) 685
Density( gcm⁻³ ) 4.79@20°C
Thermal Properties
Element Value
Melting point( C ) 217
Latent heat of evaporation( J g⁻¹ ) 333
Latent heat of fusion( J g⁻¹ ) 69
Specific heat( J K⁻¹ kg⁻¹ ) 321@25°C
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.5@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 37@0-100°C

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