Atacamite

Atacamite is a copper halide mineral: a copper(II) chloride hydroxide with formula Cu2Cl(OH)3. It was first described for deposits in the Atacama Desert of Chile in 1801. Atacamite is polymorphous with botallackite, clinoatacamite, and paratacamite. Atacamite is a comparatively rare mineral, formed from primary copper minerals in the oxidation or ...
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Atacamite

• (n.) An oxychloride of copper, usually in emerald-green prismatic crystals.
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Atacamite

A·tac'a·mite noun [ From the desert of Atacama , where found.] (Min.) An oxychloride of copper, usually in emerald-green prismatic crystals.
Found on http://www.encyclo.co.uk/webster/A/138

Atacamite

Atacamite is the native hydrous oxychloride of copper. It is a comparatively rare mineral occurring in arid regions in the upper oxidised zone of copper deposits. It has the formulae Cu2Cl(OH)3 and a relative hardness of 4. It is named after the desert of Atacama in South America, where it is found.
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Atacamite

Copper(II) oxychloride
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atacamite

green, brilliant halide mineral, basic copper chloride [Cu2(OH)3Cl]. It is a secondary mineral, formed by the oxidation of other copper minerals, ...
Found on http://www.britannica.com/eb/a-z/a/117
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