Selenium Pellets

Formula: Se

Form: Pellet/Lump

Material: Selenium

CAS Number: 7782-49-2

Commodity: Metals

Purity: 99.999%

Maximum Lump Size: 3mm

Hazard Pictogram: GHS06, GHS08, GHS09

Selenium pellets, produced by Goodfellow, are a high-purity form of elemental selenium shaped into small cylindrical or spherical pieces. Some key properties of selenium include its semiconductor behavior and photovoltaic effect. Selenium pellets find use in applications like rectifiers, solar cells, and photocopiers. As part of Goodfellow's extensive range of metals, alloys, ceramics, polymers, composites, and other materials, these selenium pellets enable research and prototyping across a wide variety of industries.

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Technical Data Sheet Safety Data Sheet Tolerance Properties

Acute toxicity

Serious health hazard

Hazardous to the environment

each

Tolerances

Pellet/Lump

Maximum Lump Size		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