Tags: Chemical Substance, Mineral.

Greigite is an iron sulfide mineral with formula Fe3S4 (Iron(IIIII) sulfide). It is the sulfur equivalent of the iron oxide magnetite (Fe3O4). It was first described in 1964 for an occurrence in San Bernardino County California and named after the mineralogist and physical chemist Joseph W. Greig (1895–1977).

Greigite_structure_110_SFe4_tetrahedra.png

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