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Hydrodresserite: BaAl2(CO3)2(OH)4·3(H2O) Weloganite: Sr3Na2Zr(CO3)6·3(H2O)
Comments: White spherical aggregates of hydrodresserite with radiating structure with columnar weloganite. Location: Francon Quarry, Montreal, Quebec, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species