Antimony triselenide

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Antimony triselenide
Sb2Se3 structure.jpg
Other names
3D model (JSmol)
ECHA InfoCard 100.013.870
Molar mass 480.4 g/mol
Appearance black crystals
Density 5.81 g/cm3, solid
Melting point 611 °C (1,132 °F; 884 K)
Orthorhombic, oP20, SpaceGroup = Pnma, No. 62
US health exposure limits (NIOSH):
PEL (Permissible)
TWA 0.5 mg/m3 (as Sb)[1]
REL (Recommended)
TWA 0.5 mg/m3 (as Sb)[1]
Related compounds
Other anions
antimony(III) oxide, antimony(III) sulfide, antimony(III) telluride
Other cations
arsenic(III) selenide, bismuth(III) selenide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Antimony triselenide is the chemical compound with the formula Sb2Se3. The material exists as the sulfosalt mineral antimonselite, which crystallizes in an orthorhombic space group.[2] In this compound, antimony has the oxidation state +3 and selenium −2, but in fact the bonding in this compound is highly covalent as reflected by the black color and semiconducting properties of this and related materials.[3]

It may be formed by the reaction of antimony with selenium.


Sb2Se3 is now actively explored for thin film solar cells and have achieved 5.6% certified efficiency.


  1. ^ a b "NIOSH Pocket Guide to Chemical Hazards #0036". National Institute for Occupational Safety and Health (NIOSH). 
  2. ^ Jambor, J. L.; Grew, E. S."New Mineral Names" American Mineralogist, Volume 79, pages 387-391, 1994.
  3. ^ Caracas, R.; Gonze, X. "First-principles study of the electronic properties of A2B3 minerals,, with A=Bi,Sb and B=S,Se, Note: Hypothetical sulphosalt structure derived from density functional theory"" Physics and Chemistry of Minerals 2005, volume 32 p.295-300.