Botallackite

Template:Infobox mineral Botallackite, chemical formula Cu₂[(OH)₃|Cl] is a secondary copper mineral, named for its type locality at the Botallack mine, St Just in Penwith, Cornwall. It is polymorphous with Atacamite, Paratacamite and Clinoatacamite.^[1]

In the monoclinic crystal system, Botallackite is mountain-green to green in colour, with one distinct to good cleavage.^[1]

Botallackite forms in copper deposits exposed to weathering and salt water.^[1]

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