Buttgenbachite

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Buttgenbachite
Image credit: RRUFF

Description

Raman of buttgenbachite
Image credit: RRUFF

An azure blue corrosion product found in some artificial copper patinas. Its composition is Cu19Cl4(NO3)2(OH)32.

Physical and Chemical Properties

Composition = Cu₁₉C_l4(NO₃)₂(OH)₃₂
Luster=vitreous to glassy

Resources and Citations

J. Riederer, "Zur Historischen Entwicklung der Kenntnis von Korrosionsprodukten auf Kulturgeschichtlichen Objekten aus Kupferleigierungen" Berliner Beitrage zur Archaometrie 11:93-111.

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