Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.76-3.772.56-2.60
1
7.18
👆🏻
Fracture
-
Uneven, ConchoidalWalter Schumann
Cleavage
{110} Perfect, {110} Perfect
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Mohs Hardness
5-66-6.5
2
10
👆🏻
Chemical Composition
(Fe,Mn) 7Si 7O 21Ulrich Henn and Claudio C.
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8