Dmisokolovite
Dmisokolovite is an IMA-recognized mineral species in the arsenate class, with the chemical formula K₃Cu₅AlO₂(AsO₄)₄.
It crystallizes in the monoclinic crystal system (space group C2/c).
Key properties: Mohs hardness 3; specific gravity 4.26; Light green streak; Vitreous luster; optically biaxial.
IMA symbol Dsk, IMA status: approved, named in 2013.
Occurs as sublimate incrustations and/or the product of reaction between rock and volcanic gas on the surface of basalt scoria in an active fumarole.
It is found associated with Shchurovskyite, bradaczekite, tenorite, johillerite, tilasite, melanarsite, hematite, aphthitalite, langbeinite, orthoclase.
The mineral was named to honor Russian mineralogist, volcanologist, and geologist, Dmitry Ivanovich Sokolov (1788-1852), Professor of Mineralogy and Geology at St. Petersburg University.