Indium(III) sulfide
| Names | |
|---|---|
| Other names
Indium sesquisulfide Diindium trisulfide | |
| Identifiers | |
3D model (JSmol) |
|
| ChemSpider | |
| ECHA InfoCard | 100.031.571 |
PubChem CID |
|
| UNII | |
CompTox Dashboard (EPA) |
|
| |
| |
| Properties | |
| In2S3 | |
| Molar mass | 325.82 g·mol−1 |
| Appearance | red powder |
| Density | 4.90 g cm−3, solid |
| Melting point | 1,050 °C (1,920 °F; 1,320 K) |
| insoluble | |
| Hazards | |
| GHS labelling: | |
| Warning | |
| H302+H332, H315, H319, H335 | |
| P280, P301+P330+P331, P302+P352, P304+P340, P312, P332+P313, P337+P313 | |
| NFPA 704 (fire diamond) | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
Indium(III) sulfide (Indium sesquisulfide, Indium sulfide (2:3), Indium (3+) sulfide) is the inorganic compound with the formula In2S3.
It has a "rotten egg" odor characteristic of sulfur compounds, and produces hydrogen sulfide gas when reacted with mineral acids.
Three different structures ("polymorphs") are known: yellow, α-In2S3 has a defect cubic structure, red β-In2S3 has a defect spinel, tetragonal, structure, and γ-In2S3 has a layered structure. The red, β, form is considered to be the most stable form at room temperature, although the yellow form may be present depending on the method of production. In2S3 is attacked by acids and by sulfide. It is slightly soluble in Na2S.
Indium sulfide was the first indium compound ever described, being reported in 1863. Reich and Richter determined the existence of indium as a new element from the sulfide precipitate.