pyrite structure

Pyrite is an iron disulfide mineral, often called "fool's gold" due to its resemblance to gold. Its name originates from the Greek word for fire, as it sparks when struck. Pyrite is found widely in various geological environments, including igneous, sedimentary, and metamorphic rocks.1

Crystallographically, pyrite belongs to the isometric crystal system, displaying high symmetry. Its structure is modeled after the sodium chloride type, with disulfide groups coordinated by iron atoms. This structural arrangement is reflected in its external crystal forms, which are often cubic or pyritohedral. Pure pyrite has a chemical composition of FeS₂, containing 46.67% iron and 53.33% sulfur by weight.12