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|---|---|---|
 Date: 2007-09-30 00:49:08Matter Djurleite Chalcocite Bornite Chalcopyrite Covellite Ore Carrollite Digenite Sulfide minerals Chemistry Crystallography |
 | USGS Mineral Resources Program Cobalt—For Strength and Color As part of a broad mission to conduct research and provideDocID: pZKQ - View Document |
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 | Co2+ Co3+ 2 S4DocID: 1Umz - View Document |
 | Co2+ Co3+ 2 S4DocID: 1Umx - View Document |