The mineral pyrite, or iron pyrite, also known as fool's gold, is an iron sulphide with the chemical formula FeS2 (iron(II) disulphide). Pyrite is considered the most common of the sulphide minerals
Structure and thermochemistry of Fe 2 S 2 −/0/+ gas phase clusters and their fragments. B3LYP calculations - Physical Chemistry Chemical Physics (RSC Publishing) DOI:10.1039/B207188F