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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
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 -
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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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