Green inclusions of tolbachite associated to halite from Rudna Mine, Lubin District, Lower Silesia, Poland. Tolbachite si a very rare copper chloride. — Photo: David Hospital · CC BY-SA 4.0
Tolbachite
Tolbachite is an IMA-recognized mineral species in the halide class, with the chemical formula CuCl₂.
It crystallizes in the monoclinic crystal system (space group C2/m).
Key properties: specific gravity 3.42; Pearly luster.
IMA symbol Tbc, IMA status: approved, named in 1982.
Occurs as fumarolic incrustations on basalt (Tolbachik volcano, Russia); formed with other copper chlorides in an oxidized copper deposit (Bisbee, Arizona, USA).
It is found associated with Tenorite, euchlorine, dolerophanite, piypite, ponomarevite, kamchatkite, klyuchevskite, chalcocyanite, cotunnite, sofiite, halite, sylvite, (Tolbachik volcano.
The name refers to its occurrence at the Tolbachik volcano, Russia.