IMA mineral species

Kumtyubeite

Ca₅(SiO₄)₂F₂

Nesosilicate mineral.

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

Properties

Chemical formulaCa₅(SiO₄)₂F₂
ElementsCa, Si, O, F
Crystal systemMonoclinic
Mohs hardness—
Density—
Streak—
Color—
IMA symbolKty
Nickel–Strunz class9.AF.45

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

🌍 Where it's found

Type locality (where it was first described): Mount Lakargi, Russia