Cuprite and tenorite are important as corrosion products of copper and as alteration products or colorants. In the case of tenorite this alteration is usually undesirable, resulting from degradation of azurite or decomposition of copper(I) chloride (cuprous chloride) under very alkaline conditions. The mode of occurrence of cuprite in ancient bronzes is reviewed. The use of cuprite as a pigment in ancient glasses is discussed and the intermediate compound, copper(II) hydroxide (cupric hydroxide), is briefly described.
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David A. Scott (1997) studied this question.
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