Petrovite
A blue-green sodium-calcium-copper sulfate with a porous framework structure, from Tolbachik's fumaroles.
Intro adapted from Wikipedia (CC BY-SA).
Petrovite is an IMA-recognized mineral species in the sulfate class, with the chemical formula Na₁₂Cu₂(SO₄)₈.
It crystallizes in the monoclinic crystal system (space group P2_1/c).
Key properties: Mohs hardness 4; specific gravity 2.8; White streak; Vitreous luster; optically biaxial.
IMA symbol Pv, IMA status: approved, named in 2019.
Forms as a sublimate at an active volcanic fumarole.
It is found associated with Tenorite, euchlorine, dobrovolskiite. Distribution From the Arsenatnaya fumarole.
The mineral was named to honor Russian Professor Dr. Tomas Georgievich Petrov (b. 1931), former chairman of the Crystallogenesis Laboratory, Department of Crystallography, St.