Pavlovskyite
Pavlovskyite is an IMA-recognized mineral species in the silicate class, with the chemical formula Ca₈(SiO₄)₂(Si₃O₁₀).
It crystallizes in the orthorhombic crystal system (space group Pbcn).
Key properties: Mohs hardness 6–6.5; specific gravity 2.97; White streak; Vitreous luster; optically biaxial.
IMA symbol Pvs, IMA status: approved, named in 2010.
Found in veins cutting metasomatically altered silicate carbonate xenoliths in a gabbro massif (Birkhin massif); in cuspidine zones of altered carbonate xenoliths in ignimbrites (Upper Chegem caldera).
It is found associated with Dellaite, galuskinite, spurrite, calico-olivine, cuspidine, rusinovite, larnite.
The mineral was named to honor Evgeny Vladimirovich Pavlovsky (1901-1982), a geologist who studied Eastern Siberia, in particular the Baikal region.