Koashvite

koashvite

Images

Formula: Na₆CaTiSi₆O₁₈
Cyclosilicate (ring silicate), koashvite subgroup, lovozerite group, titanium-bearing mineral
Crystal System: Orthorhombic
Specific gravity: 2.98 to 3.02 measured, 3.069 calculated
Hardness: 6
Colour: Pale yellow
Common impurities: Mg,K
Environments

Pegmatites

Localities

At the type locality, the Koashva Open Pit, Koashva Mt, Khibiny Massif, Murmansk Oblast, Russia, koashvite occurs as veinlets replacing lomonosovite in an ultra-agpaitic pegmatite in an alkalic massif.
Associated minerals include lomonosovite, pectolite, villiaumite and natrophosphate (HOM).
Koashvite from the Koashva Open Pit - Image

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