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Noun
1. pyrrhotite
Wikipedia definition
2. PyrrhotitePyrrhotite is an unusual iron sulfide mineral with a variable iron content: Fe(1-x)S (x = 0 to 0.2). The FeS endmember is known as troilite. Pyrrhotite is also called magnetic pyrite because the color is similar to pyrite and it is weakly magnetic. The magnetism increases as the iron content decreases, and the troilite is non-magnetic.
Read “Pyrrhotite” on English Wikipedia
Read “磁硫鉄鉱” on Japanese Wikipedia
Read “Pyrrhotite” on DBpedia

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