Cumengite

Pb21Cu20Cl42(OH)40.6H2O

This sample of cumengite is displayed in the Smithsonian Museum of Natural History. Cumengite is a chloride of copper and lead with the composition Pb21Cu20Cl42(OH)40.6H2O. The large sample at left is about 12 cm across. This mineral been also labeled cumengeite.

Mindat: Cumengite

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