Mackinawite
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Mackinawite is an iron sulfide mineral, which can contain nickel substituting for iron, with as chemical formula 1+xS. As indicated by its chemical composition, Fe, Fe is present with an excess of × o
Mackinawite 95018
Troilite
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Troilite is a rare iron sulfide mineral with the simple formula of FeS. It is the iron-rich endmember of the pyrrhotite group. Pyrrhotite has the formula FeS which is iron deficient. As troilite lacks
Mackinawite
…a hydrothermal alteration product, in meteorites, and in association with chalcopyrite, cubanite, pentlandite, pyrrhotite, greigite, maucherite, and troilite. Mackinawite also occurs in reducing environments such as freshwater and marine sediments as a result of the metabolism of iron and sulfate-reducing…
Polished and etched surface of the Mundrabilla meteorite from Australia. The darker brownish areas with striations are troilite with exolved daubréelite.