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ATHENA

MINERALOGY

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Mineral: BRAMMALLITE = a series name
Formula: (Na,H3O)(Al,Mg,Fe)2(Si,Al)4O10[(OH)2,H2O] (?)
Crystal System: Monoclinic
References: DAN Earth Sci. 208 (1973), 157; CM 36 (1998), 905
Type Locality: Llandybie, Dyfed, South Wales, United Kingdom
Comments: Na rich Illite

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