Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.95-3.072.56-2.60
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, ConchoidalWalter Schumann
Cleavage
Perfect on {110} at 56° and 124°; partings on {010} and {100}
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Mohs Hardness
5-66-6.5
2
10
👆🏻
Chemical Composition
Ca 2Mg 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8