General Information:
Chemical Formula:Na2(Ti,Fe+++)Si4(O,F)11
Environment:Pegmatite dikes.
Locality:Narsarsuk, southern Greenland.
Name Origin:Named after its locality.
Physical Properties: Cleavage:[???] Good, [???] Good
Color:brown, brownish gray, colorless, green, or honey yellow.
Density:2.7
Diaphaniety:Transparent to translucent
Habits:Tabular - Form dimensions are thin in one direction., ,
Hardness:7 - Quartz
Luster:Vitreous (Glassy)
Streak:white
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