Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.19-3.563.32-3.43
1
7.18
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Fracture
Uneven, Conchoidal
Conchoidal
Cleavage
{110} Perfect, {010} Indistinct
Poor on {110} and {100} very poor on {001}
Mohs Hardness
5.5-66-7
2
10
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Chemical Composition
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)
Ca10(Mg,Fe)2Al4(SiO4)5(Si2O7)2(OH)4