Pyrrhotite: Santa Eulalia, Chihuahua, Mexico. (Connoisseur's Choice).

Rocks & Minerals | July 1, 2003| | Copyright

Everyone is familiar with iron sulfide--it is pyrite, Fe[S.sub.2], fool's gold, brassy cubes, right? Well, file story of iron sulfides is far more complicated than simply that of pyrite, a mineral with which some are all too familiar. There are several other compositions and crystallographic variations on the iron sulfide theme that merit consideration. For instance, everyone with a technical interest in meteorites is familiar with troilite (FeS). Most economic geologists, and those with more than a passing interest in mineralogy and mineral collecting, certainly have seen ...

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