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ATHENA

MINERALOGY

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Mineral: HIORTDAHLITE
Formula: Na2Ca4(Ca0,5Zr0,5)Zr(Si2O7)2OF3
Crystal System: Anorthic (Triclinic)
Group: Wöhlerite group
IMA Number: 1987 s.p.
References: CM 12 (1974), 241;TMPM 34 (1985), 297; HB2/1 (1995); CM 50 (2012), 531; MM 86 (2022), 661
Type Locality: Mittel-Arø (Aro) Island, Langesundfjord, Norway

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