Calumetite

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Calumentite; Jeff Weissman / Photographic Guide to Mineral Species at Web Mineral: Link

Description

A light blue copper corrosion product. Calumetite occurs rarely as a mineral. It has the composition of Cu(OH, Cl)2 - 2(H2O).

Resources and Citations

David Scott, 'A Review of Copper Chlorides and Related Salts in Bronze Corrosion and as Painting Pigments'. Studies in Conservation, 45, 39-54, (2000).

WebMineral: Calumentite

Wikipedia: Calumentite

Mindat: Calumentite

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Materials database