Antimony triselenide

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OtherNames = antimonselite
Formula = Sb₂Se₃
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CASNo = 1315-05-5
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MolarMass = 480.4 g/mol
Appearance = black crystals
Density = 5.81 g/cm³, solid
MeltingPt = 611°C
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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. [Jambor, J. L.; Grew, E. S."New Mineral Names" American Mineralogist, Volume 79, pages 387-391, 1994.] 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. [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.] I

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