Petrovicite
Petrovicite is an IMA-recognized mineral species in the sulfosalt class, with the chemical formula Cu₃HgPbBiSe₅.
It crystallizes in the orthorhombic crystal system. It is a member of the Petrovicite structural group.
Key properties: Mohs hardness 3; specific gravity 7.707; Strong metallic. Anisotropism: Weak; dark green and violet. R1 –R2: (400) 44.0–44.4, (420) 44.1–44.8, (440) 44.2–45.2 luster.
IMA symbol Pvc, IMA status: approved, named in 1975.
Found in hydrothermal dolomite-calcite veins with other selenides.
It is found associated with Berzelianite, eucairite, crookesite, tyrrellite, ferroselite, bukovite, kruťaite, athabascaite, umangite, eskebornite, calcite, dolomite.
The name refers to its occurrence in the Petrovice deposit, Czech Republic.