Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.56-2.602.50
1
7.18
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Fracture
Uneven, ConchoidalWalter Schumann
Uneven, Conchoidal
Cleavage
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Distinct on {100} and {110}
Mohs Hardness
6-6.55.5-6
2
10
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Chemical Composition
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8
3NaAlSi 3O 8 · NaClAnthony et al , Handbook of mineralogy (2001)