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Kvanefjeldite

Type Locality
Kvanefjeldite occurrence, Kvanefjeld adit, Kvanefjeld Uranium deposit, Kuannersuit Plateau (Kvanefjeld), Ilímaussaq complex, Narsaq, Kujalleq, Greenland
Mineral Data
Na4(Ca,Mn)(Si3O7)2(OH)2
Strunz: 
9.DP.30
Physical Properties
Hardness: 
5.5 - 6.0