IMA mineral species

Volkovskite

KCa₄[B₅O₈OH]₄[B(OH)₃]₂Cl * 4H₂O

Borate mineral.

Volkovskite specimen
Volkovskite.jpg · Wikimedia Commons (see file page for author & license)

Properties

Chemical formulaKCa₄[B₅O₈OH]₄[B(OH)₃]₂Cl * 4H₂O
ElementsK, Ca, B, O, H, Cl
Crystal systemTriclinic
Mohs hardness—
Density—
Streak—
Color—
IMA symbolVlk
Nickel–Strunz class6.EC.20

“—” means no reliable value in Wikidata yet. Check Mindat for full data.

🌍 Where it's found

Type locality (where it was first described): Inder Lake, Kazakhstan · Clover Hill deposit, Canada