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Atacamite is a mineral found originally in the desert of Atacama Desert, Chile, and named by D. de Gallizen in 1801. It is a copper(II) chloride hydroxide, with formula Cu2Cl(OH)3.
Its colour is various shades of green, usually dark. Atacamite is a comparatively rare mineral, formed from primary copper minerals in the oxidation or weathering zone of arid climates.
Atacamite is polymorphous with Botallackite.
Atacamite, Locality: York, Australia (*)
* This article incorporates text from the Encyclopædia Britannica Eleventh Edition, a publication now in the public domain.