Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.3-3.52.56-2.60
1
7.18
👆🏻
Fracture
Uneven
Uneven, ConchoidalWalter Schumann
Cleavage
Perfect on [110]
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Mohs Hardness
5-66-6.5
2
10
👆🏻
Chemical Composition
NaNa2(Fe++4Fe+++)Si8O22(OH)2
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8