White crystals of the very rare K-Ti-Li mineral berezanskite from the TL in Dara-i-Pioz (Dara-i-Pioz Glacier, Tien Shan Mountains, Region of Republican Subordination, Tajikistan), and only one of two known localities worldwide. Ex. Erich Laskowski collection (USA). — Photo: David Hospital · CC BY 4.0
Berezanskite
Berezanskite is an IMA-recognized mineral species in the silicate class, with the chemical formula KTi₂Li₃Si₁₂O₃₀.
It crystallizes in the hexagonal crystal system (space group P6/mcc). It is a member of the Milarite structural group.
Key properties: Mohs hardness 2.5–3; specific gravity 2.66; White streak; Vitreous to pearly luster; optically uniaxial.
IMA symbol Bzk, IMA status: approved, named in 1996.
Found in a block of alkali pegmatite in glacial moraine.
It is found associated with Quartz, aegirine, microcline, Cs-kupletskite, hyalotekite, polylithionite, tadzhikite-(Y), dusmatovite, zektzerite, stillwellite-(Ce).
The mineral was named to honor geologist Anatolyi Vladimirovich Berezansky (b. 1948).