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Atacamite is a mineral found originally in the desert of Atacama, and named by D. de Gallizen in 1801. It is a cupric chloride, having the formula Cu2Cl(OH)3. Its color presents various shades of green, usually dark. Atacamite is a comparatively rare mineral, formed in some cases by the action of sea-water and occurring also as a volcanic product.
Cu2Cl(OH)3 - Copper Chloride Hydroxide
Class:
Emerald-green, black-green
Green
Vitreous
Translucent
3.8
3 - 3.5
Perfect
Conchoidal
Prismatic crystals, columnar, radial and lamellar aggregates, granular, massive.
Non-fluorescent
Frequency:
Uncommon
Origin:
Secondary in the oxidation zone of copper deposits in the arid climate, associated with other copper minerals.
Occurence:
Burra district, Southren Australia; Tsumeb, Namibia; Bisbee, Arizona, USA.
Application:
Minor ore of copper and as a mineral specimen.

 
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