from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A tetragonal iron nickel sulfide mineral that occurs as opaque bronze to grey-white tabular crystals and anhedral masses.
Mackinaw mine, Washington, where an occurrence was first described, and -ite. (Wiktionary)
A sample of the sulphide mineral selected for petrographic analysis was determined to contain an alteration assemblage of minerals including godlevskite (Ni9S8) along with veining of mackinawite ((Fe, Ni) 9S8).