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MineralsArsenopyrite

18th Jun 2010 08:01 UTCJoseph Ryan

So ... If the Iron is +3 (could also be +2 but I don't think so here) ... and the sulfur is -2 ... that would make the arsenic -1 in this very common mineral. But most geology site i have read say that arsenic only has -3, 0, +3, and +5 oxidation states. Wgat is the deal?

15th Jul 2010 21:29 UTCReiner Mielke Expert

Arsenopyrite is not ionic so you can't look at it that way. Another more simple example is pyrite. If you want a detailed description of arsenopyrite see: http://rruff.geo.arizona.edu/doclib/zk/vol179/ZK179_335.pdf

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