Iron(III) sulfide
Unstable artificial chemical compound
From Wikipedia, the free encyclopedia
Iron(III) sulfide, also known as ferric sulfide or sesquisulfide (Fe
2S
3), is one of the several binary iron sulfides. It is a solid, black powder that degrades at ambient temperature.[2]
| Names | |
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| IUPAC name
Iron(III) sulfide | |
| Other names
Iron sesquisulfide Ferric sulfide Diiron trisulfide | |
| Identifiers | |
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| Properties | |
| Fe2S3 | |
| Molar mass | 207.90 g/mol [1] |
| Appearance | yellow-green [1] |
| Density | 4.3 g/cm3 [1] |
| Melting point | decomposition [1] |
| 0.0062g/L[1] | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Reactions
Fe
2S
3 precipitates from solutions containing its respective ions:[2]
- 2Fe3+ + 3S2− → Fe2S3
The resulting solid decays at a temperature over 20 °C into iron(II) sulfide (FeS) and elemental sulfur:[3]
- Fe2S3 → 2 FeS + S
With hydrochloric acid it decays according to the following reaction equation:[4]
- Fe2S3 + 4 HCl → 2 FeCl2 + 2 H2S + S
Greigite
Greigite, with the chemical formula Fe2+Fe3+2S4, is a mixed valence compound containing both Fe(III) and Fe(II). It is the sulfur equivalent of the iron oxide magnetite (Fe3O4). As established by X-ray crystallography, the S anions form a cubic close-packed lattice, and the Fe cations occupy both tetrahedral and octahedral sites.[5]