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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