Lemmleinite-(K)

lemmleinite-(K)

sazykinaite

lomonosovite

lamprophyllite

Images

Formula: Na₄K₈Ti₈(Si₄O₁₂)₄(OH,O)₈.8H₂O
Cyclosilicate (ring silicate), lemmleinite group, labuntsovite supergroup, titanium-bearing mineral
Crystal System: Orthorhombic
Specific gravity: 2.80 measured, 2.86 calculated
Hardness: 5
Streak: White
Colour: Colourless
Luminescence: Nonfluorescent under UV
Solubility: Insoluble in water and acids at room temperature
Common impurities: Na
Environments

Pegmatites

Localities

At the type locality, the Koashva Open Pit, Koashva Mt, Khibiny Massif, Murmansk Oblast, Russia, lemmleinite-(K) occurs in ultra-agpaitic pegmatites in apatite-nepheline ores. Associated minerals include sodalite, natrolite, aegirine, K-feldspar, pectolite, alkali amphibole, lamprophyllite, lomonosovite, sphalerite, sitinakite, catapleiite, rhabdophane-(Ce) and intergrowths of sazykinaite (AM 85.1843-1847).

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