Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.56-2.602.9-3.5
1
7.18
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Fracture
Uneven, ConchoidalWalter Schumann
Conchoidal
Cleavage
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
{110} Perfect, {???} Distinct, {???} Distinct
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
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)