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Leifite

Type Locality
Narsaarsuk pegmatite (Narssârssuk pegmatite), Narsaarsuk Plateau, Igaliku (Igaliko), Narsaq, Kujalleq, Greenland
Mineral Data
(Na,H2O)Na6[Be2Al2(Al,Si)Si15O39]F2
Strunz: 
9.EH.25
Physical Properties
Colour: 
Colorless
Hardness: 
6.0
Tenacity: 
brittle