Tenacity
Brittle
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
2.972.56-2.60
1
7.18
👆🏻
Fracture
Uneven
Uneven, ConchoidalWalter Schumann
Cleavage
None observed
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Mohs Hardness
2.56-6.5
2
10
👆🏻
Chemical Composition
Na 3AlF 6Ulrich Henn and Claudio C.
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8