Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.56-2.603.32-3.43
1
7.18
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Fracture
Uneven, ConchoidalWalter Schumann
Conchoidal
Cleavage
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Poor on {110} and {100} very poor on {001}
Mohs Hardness
6-6.56-7
2
10
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Chemical Composition
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8
Ca10(Mg,Fe)2Al4(SiO4)5(Si2O7)2(OH)4