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Fluornatromicrolite

Type Locality
Quixaba pegmatite, Quixaba, Frei Martinho, Borborema mineral province, Paraíba, Brazil
Mineral Data
(Na,Ca,Bi)2Ta2O6F
Strunz: 
4.DH.15
Physical Properties
Colour: 
Green
Crystal System: 
Isometric
Streak: 
White
Hardness: 
5.0 - 0.0
Tenacity: 
brittle