Zircophyllite

zircophyllite

aegirine

augite

leucophanite

Images

Formula: K2NaFe2+7Zr2(Si4O12)2O2(OH)4F
Inosilicate (chain silicate), single chains, astrophyllite group, astrophyllite supergroup
Crystal system: Triclinic
Specific gravity: 3.34 measured
Hardness: 4 to 4½
Streak: Light brown
Colour: Black-brown
Common impurities: Ti,Hf,H2O
Environments

Pegmatites

Localities

At the Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada, zircophyllite grains have been found in a sample that also contains its Mn-analogue, kupletskite and astrophyllite (CM 54.6.1539-1547).
Zircophyllite from the Poudrette Quarry - Image

At the type locality, the Korgeredaba alkaline massif, Sangilen Upland, Tuva, Russia, zircophyllite occurs in the natrolite zone of alkalic pegmatites. Associated minerals include aegirine-augite, leucophanite, fluorite, apatite and apophyllite (HOM).

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