Pushcharovskite
Pushcharovskite is an IMA-recognized mineral species in the arsenate class, with the chemical formula K₀.₆Cu₁₈[AsO₂(OH)₂]₄[AsO₃OH]₁₀(AsO₄)(OH)₉.₆·18.6H₂O.
It crystallizes in the triclinic crystal system (space group P-1).
Key properties: specific gravity 3.35; White streak; Vitreous luster; optically biaxial.
IMA symbol Pus, IMA status: approved, named in 1995.
A very rare secondary mineral from the oxidized zone of a polymetallic hydrothermal base metal deposit (Cap Garonne mine, France).
It is found associated with Tennantite, covellite, geminite, lindackerite, yvonite, mahnertite, arsenopyrite, bismuth, chalcopyrite, quartz.
The mineral was named to honor Professor Dmitry Y. Pushcharovskiy, crystallographer, Moscow State University, Moscow, Russia.