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ATHENA

MINERALOGY

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Mineral: HUNDHOLMENITE-(Y)
Formula: (Y,REE,Ca,Na)15(Al,Fe3+)(CaxAs3+1–x)(Si,As5+)Si6B3(O,F)48 (x = 0,78)
Crystal System: Rhombohedral (Trigonal)
Group: Vicanite group
IMA Number: 2006-005
References: MM 71 (2007), 179
Type Locality: Hundholmen, Tysfjord, Nordland County, Norway

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