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chalcanthite




chalcanthite
A mineral that consists of mainly of hydrated copper sulfate (CuSO4), although it is rarely used as a source of copper. It occurs as greenish-blue triclinic crystals or as fibrous veins or stalactites. It is soluble in water and has a nauseating taste. Hardness 2.5; relative density 2.25.


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   • GEOLOGY AND PLANETARY SCIENCE