Antimony triselenide

Antimony triselenide

Names
Other names antimonselite selenoxyantimony
Identifiers
CAS Number	1315-05-5
ChemSpider	11483776
Jmol 3D model	Interactive image
PubChem	6391662
InChI InChI=1S/2Sb.3Se/q2*+3;3*-2 Key: WWUNXXBCFXOXHC-UHFFFAOYSA-N InChI=1S/2Sb.3Se/q2*+3;3*-2 Key: WWUNXXBCFXOXHC-UHFFFAOYSA-N
SMILES [SbH3+3].[SbH3+3].[Se-2].[Se-2].[Se-2]
Properties
Chemical formula	Sb2Se3
Molar mass	480.4 g/mol
Appearance	black crystals
Density	5.81 g/cm^3, solid
Melting point	611 °C (1,132 °F; 884 K)
Structure
Crystal structure	Orthorhombic, oP20, SpaceGroup = Pnma, No. 62
Hazards
US health exposure limits (NIOSH):
PEL (Permissible)	TWA 0.5 mg/m^3 (as Sb)[1]
REL (Recommended)	TWA 0.5 mg/m^3 (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 is assigned 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.

Applications

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

References

1. "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.