Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
2.56-2.603.10-3.20
1
7.18
👆🏻
Fracture
Uneven, ConchoidalWalter Schumann
Uneven, Conchoidal
Cleavage
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Poor to good on (001)
Mohs Hardness
6-6.56-6.5
2
10
👆🏻
Chemical Composition
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8
(Mg,Fe) 5(SiO 4) 2(F,OH) 2Ulrich Henn and Claudio C.