Chubarovite
Chubarovite is an IMA-recognized mineral species in the borate class, with the chemical formula KZn₂(BO₃)Cl₂.
It crystallizes in the hexagonal crystal system (space group R32).
Key properties: Mohs hardness 2; specific gravity 2.68; White streak; Vitreous luster; optically uniaxial.
IMA symbol Cub, IMA status: approved, named in 2014.
Formed as sublimates on basaltic scoria around active volcanic fumaroles.
It is found associated with Fluoborite, krasheninnikovite, sylvite, halite, langbeinite, aphthitalite, arcanite, zincite, flinteite, wulffite, johillerite, urusovite, pseudobrookite.
The mineral was named to honor the Russian mineralogist and physicist Valeriy Mikhailovich Chubarov (b. 1948), a specialist in electron microprobe analysis, Institute of Volcanology and Seismology.