Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:TETRANATROLITE = GONNARDITE
Formula:(Na,Ca)16[Al19Si21O80] · 16H2O (?)
Crystal System:Quadratic (Tetragonal)
References:CM 18 (1980), 77; HB2/2 (1995); EJM 10 (1998), 1037; AM 84 (1999), 1445
Type Locality:Mont Saint-Hilaire, Rouville Co., Québec, Canada
Ilímaussaq, Greenland

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