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Noun
1. marcasite
Wikipedia definition
2. MarcasiteThe mineral marcasite, sometimes called white iron pyrite, is iron sulfide (FeS2) with orthorhombic crystal structure. It is physically and crystallographically distinct from pyrite, which is iron sulfide with cubic crystal structure. Both structures do have in common that they contain the disulfide S2 ion having a short bonding distance between the sulfur atoms. The structures differ in how these dianions are arranged around the Fe cations. Marcasite is lighter and more brittle than pyrite.
Read “Marcasite” on English Wikipedia
Read “白鉄鉱” on Japanese Wikipedia
Read “Marcasite” on DBpedia

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