Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.56-2.603.31
1
7.18
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Fracture
Uneven, ConchoidalWalter Schumann
-
Cleavage
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Indiscernible
Mohs Hardness
6-6.5-9999
2
10
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Chemical Composition
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8
NaFe 3+ 3 Al 6 (BO 3 ) 3 Si 6 O 18 (O,F,OH) 4 Anthony et al, Handbook of mineralogy (2001)