Narsarsukite

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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