Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.702.56-2.60
1
7.18
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Fracture
Uneven, Conchoidal
Uneven, ConchoidalWalter Schumann
Cleavage
Perfect on {100}
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Mohs Hardness
4.56-6.5
2
10
👆🏻
Chemical Composition
Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8