Chalcosiderite

CaFe6(PO4)4(OH)8.4H2O

This sample of chalcosiderite is displayed in the Smithsonian Museum of Natural History. Chalcosiderite is a phosphate mineral of calcium and iron with the composition CaFe6(PO4)4(OH)8.4H2O. The sample at left is about 14 cm across and is from Wheal Phoenix, Liskeard, Cornwall, England.

Mindat: Chalcosiderite

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