Iron(III) sulfide

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Iron(III) sulfide
Names
IUPAC name
Iron(III) sulfide
Other names
Iron sesquisulfide
Ferric sulfide
Diiron trisulfide
Identifiers
ChEBI
UNII
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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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]

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]

References

  1. ^ a b c d e Charles D. Hodgman, Handbook of Chemistry and Physics (1961), p.590
  2. ^ a b Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 1081. ISBN 978-0-08-037941-8.
  3. ^ Holleman, Wiberg (2001). Inorganic Chemistry. p. 1451. ISBN 0-12-352651-5.
  4. ^ H. Roempp, Chemie (1997), S. 1099; ISBN 3-13-734710-6
  5. ^ Vaughan, D. J.; Craig, J. R. "Mineral Chemistry of Metal Sulfides" Cambridge University Press, Cambridge: 1978. ISBN 0-521-21489-0.
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