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ATHENA

MINERALOGY

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Mineral: SIMPSONITE
Formula: Al4(Ta,Nb)3(O,OH,F)14
Crystal System: Rhombohedral (Trigonal)
IMA Number: 1938
References: MM 33 (1963), 458; HB3 (1997)
Type Locality: Tabba Tabba, Western Australia, Australia

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