Aurichalcite
Aurichalcite is a carbonate mineral, usually found as a secondary mineral in copper and zinc deposits. Its chemical formula is 526. The zinc to copper ratio is about 5:4.Occurrence
Aurichalcite typically occurs in the oxidized zone of copper and zinc deposits.
Associated minerals include: rosasite, smithsonite, hemimorphite, hydrozincite, malachite and azurite.
It was first described in 1839 by Bottger who named the mineral for its zinc and copper content after the Greek όρειχαλκος, for "mountain brass" or "mountain copper", the name of a fabulous metal. The type locality is the Loktevskoye Mine, Upper Loktevka River, Rudnyi Altai, Altaiskii Krai, Western Siberia, Russia.Crystallography
Aurichalcite displays prismatic crystals often in the form of encrustations and sometimes columnar structures. The crystal system is monoclinic.
