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ATHENA

MINERALOGY

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Mineral:HIORTDAHLITE-II
Formula:(Na,Ca)4Ca8Zr2(Y,Zr,REE,Na)2(Si2O7)4(O3F5)
Crystal System:Anorthic (Triclinic)
Strunz Nr:8/C.11-51
Group:Wöhlerite group
References:CM 12 (1974), 241; TMPM 34 (1985), 297; HB2/1 (1995)
Type Locality:Kipawa River, Témiscamingue Co., Québec, Canada

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