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Narsarsukite
Narsarsukite

Zinnwaldite
Zinnwaldite



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Narsarsukite
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Zinnwaldite
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
2.72-2.83
Uneven
Good on {100} and {110}
6-7
Na 2(Ti,Fe)Si 4(O,F) 11Ulrich Henn and Claudio C.
 
Elastic
-
-
2.9-3.1
Uneven
Perfect basal {001}
3.5-4.0
-