Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.19-3.562.56-2.60
1
7.18
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Fracture
Uneven, Conchoidal
Uneven, ConchoidalWalter Schumann
Cleavage
{110} Perfect, {010} Indistinct
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Mohs Hardness
5.5-66-6.5
2
10
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Chemical Composition
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8