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ATHENA

MINERALOGY

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Mineral:PREISWERKITE
Formula:NaMg2AlAl2Si2O10(OH)2
Crystal System:Monoclinic
Strunz Nr:8/H.11-140
Group:Mica group True micas. Trioctahedral
References:AM 65 (1980), 1134; HB2/2 (1995); CM 36 (1998), 905
Type Locality:Geisspfad, Binntal, Valais (Wallis), Switzerland

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