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ATHENA

MINERALOGY

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Mineral: ANNITE
Formula: KFe2+3AlSi3O10(OH)2
Crystal System: Monoclinic
Group: Mica group. True micas. Trioctahedral
IMA Number: 1998 s.p.
References: Phys. Chem. Min. 20 (1993), 382; HB2/1 (1995); CM 36 (1998), 905
Type Locality: Cape Anne, Essex Co., Massachusetts, USA

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