Selenium Powder

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.

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Technical Data Sheet Safety Data Sheet Tolerance Properties

Acute toxicity

Serious health hazard

Hazardous to the environment

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	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