Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.28-3.382.56-2.60
1
7.18
👆🏻
Fracture
Splintery, Fibrous
Uneven, ConchoidalWalter Schumann
Cleavage
Good on [110]
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Mohs Hardness
6.5-76-6.5
2
10
👆🏻
Chemical Composition
NaAlSi 2O 6Ulrich Henn and Claudio C.
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8