Iron(II,III) sulfide
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Iron(II,III) sulfide is a blue-black (sometimes pinkish[citation needed]) chemical compound of iron and sulfur with formula Fe3S4 or FeS·Fe2S3, which is much similar to iron(II,III) oxide. It occurs naturally as the sulfide mineral greigite and is magnetic. It is a bio-mineral produced by and found in magnetotactic bacteria. It is a mixed valence compound, featuring both Fe2+ and Fe3+ centers, in 1:2 ratio.
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Other names
Ferrous-ferric sulfide, greigite | |
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FeS·Fe2S3 | |
Molar mass | 295.805 |
Appearance | Bluish-black, pinkish |
Density | 4.049 g/cm3 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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