Tenacity
-
Brittle
Solubility
-
Soluble
Durability
-
-
Specific Gravity
3.19-3.563.10-3.20
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Uneven, Conchoidal
Cleavage
{110} Perfect, {010} Indistinct
Poor to good on (001)
Mohs Hardness
5.5-66-6.5
2
10
👆🏻
Chemical Composition
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)
(Mg,Fe) 5(SiO 4) 2(F,OH) 2Ulrich Henn and Claudio C.