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ATHENA

MINERALOGY

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Mineral: HELLANDITE-(Gd)
Formula: (Ca,Y)4(Gd,Y)2(Al,Fe3+,Ti4+)(Be,Li)2B4Si4O22(O,F,OH)2 (?)
Crystal System: Monoclinic
Group: Hellandite group
References: L 11(1999), 27
Type Locality: Predazzo, Italy
Comments: Uncertain

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