Indium(III) selenide

Indium(III) selenide
Names
	IUPAC name Indium(III) selenide
	Other names indium selenide, indium sesquiselenide
Identifiers
CAS Number	12056-07-4 ;
3D model (JSmol)	Interactive image;
ChemSpider	145480;
ECHA InfoCard	100.031.821
EC Number	235-016-9;
PubChem CID	166055;
CompTox Dashboard (EPA)	DTXSID00923467 ;
	InChI InChI=1S/2In.3Se/q2+3;3-2 Key: AKUCEXGLFUSJCD-UHFFFAOYSA-N;
	SMILES [Se-2].[Se-2].[Se-2].[In+3].[In+3];
Properties
Chemical formula	In2Se3
Molar mass	466.516 g/mol
Appearance	black crystalline solid
Density	5.80 g/cm³
Hazards
	GHS labelling:[1]
Pictograms
Signal word	Danger
Hazard statements	H301, H331, H373, H410
Precautionary statements	P260, P264, P270, P271, P273, P301+P316, P304+P340, P316, P319, P321, P330, P391, P403+P233, P405, P501 Preview warning: Omit Rules: keep P260, omit P261
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Indium(III) selenide is a compound of indium and selenium. It has potential for use in photovoltaic devices and has been the subject of extensive research. The two most common phases, α and β, have a layered structure, while γ has a "defect wurtzite structure." In all, five polymorphs are known: α, β, γ, δ, κ. The α-β phase transition is accompanied by a change in electrical conductivity. The band gap of γ-In₂Se₃ is approximately 1.9 eV.