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ATHENA

MINERALOGY

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Mineral:ECKERMANNITE
Formula:NaNa2(Mg4Al)Si8O22(OH)2
Crystal System:Monoclinic
Strunz Nr:8/F.08-70
Group:Amphibole group group IV: sodic group
References:HB2/1 (1995)
Type Locality:Norra Kärr, Gränna, Sweden

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