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ATHENA

MINERALOGY

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Mineral: JOHNSOMERVILLEITE
Formula: Na8Ca7(Fe2+,Mg,Mn2+)43(PO4)36
Crystal System: Rhombohedral (Trigonal)
Group: Fillowite group
IMA Number: 1979-032
References: MM 43 (1980), 833
Type Locality: Glen Cosaidh, Loch Quoich, Inverness, Scotland, United Kingdom

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