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  Copiapite is a hydrated iron sulfate mineral with formula: Fe2+Fe3+4(SO4)6(OH)2·20(H2O).

Copiapite forms in the weathering or oxidation zone of sulfide deposits in arid climates. It is soluble in water.

Copiapite was first described in 1833 for an occurrence near Copiapó, Atacama, Chile. It is sometimes known as yellow copperas

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Copiapite". A list of authors is available in Wikipedia.
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