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Mineralpedia Details for Carbonatecyanotrichite

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Carbonatecyanotrichite

Carbonatecyanotrichite

Named as the carbonate-dominant analogue of cyanotrichite. Carbonatecyanotrichite is an uncommon mineral that forms as a secondary mineral in oxidized copper-bearing deposits in localities in Kazakhstan, Kyrgyzstan, the United States, Canada, France, Switzerland, England, Wales, New Zealand, and a few others. It is found in association with volborthite, malachite, azurite, aurichalcite, pseudomalachite, spangolite, gibbsite, allophone, tangeite, brochantite, and langite.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/carbonatecyanotrichite.pdf

Formula
Cu4Al2CO3(OH)12ยท2H2
Crystal System
Orthorhombic 
Crystal Habit
Acicular, Aggregates 
Luster
Silky 
Color
blue, greenish blue, azure blue 
Class
Orthorhombic 
Hardness
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Carbonatecyanotrichite from Widowmaker mine, White Canyon, San Juan Co., Utah, United States

Carbonatecyanotrichite
            from Widowmaker mine, White Canyon, San Juan Co., Utah, United States

Bright blue velvety coating on front and back of this specimen.

Pinkish purple crystalline crust.

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Carbonatecyanotrichite from Jomac mine, San Juan Co., Utah, United States

Carbonatecyanotrichite
            from Jomac mine, San Juan Co., Utah, United States

Bright, deep blue acicular crystals in radial sprays to about 0.5mm associated with green Antlerite and Malachite.

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