Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.95-3.073.19-3.56
1
7.18
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Fracture
Conchoidal
Uneven, Conchoidal
Cleavage
Perfect on {110} at 56° and 124°; partings on {010} and {100}
{110} Perfect, {010} Indistinct
Mohs Hardness
5-65.5-6
2
10
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Chemical Composition
Ca 2Mg 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)