Canasite

canasite

fenaksite

lamprophyllite

titanite

Images

Formula: K₃Na₃Ca₅Si₁₂O₃₀(OH)₄
Inosilicate (chain silicate), canasite group
Crystal System: Monoclinic
Specific gravity: 2.707 measured, 2.65 calculated
Streak: White
Colour: Greenish yellow
Luminescence:
Solubility: Readily decomposed by acids, with the separation of silica
Environments

Plutonic igneous environments
Pegmatites

Localities

At the Murunskii Massif, Chara and Tokko Rivers Confluence, Aldan Shield, Russia, canasite occurs in charoitic rocks, associated with tinaksite, miserite and charoite (HOM).

At the type locality, the Material'naya Adit, Yukspor Mt, Khibiny Massif, Murmansk Oblast, Russia, canasite occurs as crystals to 10 cm in pegmatites in the differentiated alkalic massif. Associated minerals include fenaksite, lamprophyllite, titanite, eudialyte, nepheline, pyroxene and orthoclase (Mindat).

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