Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.50-3.603.16-3.43
1
7.18
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Fracture
Uneven
Uneven, Conchoidal
Cleavage
Good on {110}, (110) ^ (1 1 0) ≈87°; parting on {100}
{110} Good, {110} Good
Mohs Hardness
65-6
2
10
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Chemical Composition
(Na,Fe,Ca)Si 2O 6Ulrich Henn and Claudio C.
(Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)