Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:GRENMARITE
Formula:(Na,Ca)4(Mn,Na)(Zr,Mn)2(Zr,Ti)(Si2O7)2(O,F)2
Crystal System:Monoclinic
Strunz Nr:8/C.13-05
Group:Rosenbuschite Group
References:EJM 16 (2004), 971
Type Locality:Vesle Arøya, Langesundsfjord, Norway

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