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Epistolite

Type Locality
Nunarssuatsiaq, Tunulliarfik Fjord (Tunugdliarfik), Ilímaussaq complex, Narsaq, Kujalleq, Greenland
Mineral Data
Na2(Nb,Ti)2(Si2O7)O2·nH2O
Strunz: 
9.BE.30
Physical Properties
Hardness: 
2.5 - 3.0