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Kumtyubeite
Type Locality
Lakargi Mt., Verkhnechegemskaya caldera (Verkhni Chegem caldera; Upper Chegem caldera), Kabardino-Balkarian Republic, Northern Caucasus Region, Russia
Mineral Data
Ca
5
(SiO
4
)
2
F
2
Strunz:
9.AF.45
Physical Properties
Hardness:
5.0 - 6.0
Tenacity:
brittle
