greigite

English

Etymology

From Joseph W. Greig, American mineralogist, +‎ -ite.

Noun

greigite (uncountable)

1. (mineralogy) A magnetic form of iron sulfide, Fe²⁺Fe³⁺₂S₄, analogous to magnetite, produced by microorganisms and found in lake sediments; Note: half the iron ions are ferrous and half ferric.

Further reading

• David Barthelmy (1997–2025) “Greigite”, in Webmineral Mineralogy Database.
• “greigite”, in Mindat.org‎^[1], Hudson Institute of Mineralogy, 2000–2025.
• OED 2006