IMA mineral species

Solongoite

Ca₂B₃O₄(OH)₄Cl

Nesoborate mineral.

White & Clear

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

Properties

Chemical formulaCa₂B₃O₄(OH)₄Cl
ElementsCa, B, O, H, Cl
Crystal systemMonoclinic
Mohs hardness3.5
Density—
Streakwhite
Colorcolorlessness
IMA symbolSol
Nickel–Strunz class6.CA.40

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

🌍 Where it's found

Type locality (where it was first described): Solongo boron deposit, Russia