Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.19-3.562.30-2.50
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Uneven
Cleavage
{110} Perfect, {010} Indistinct
Perfect on (001)
Mohs Hardness
5.5-64.5-5
2
10
👆🏻
Chemical Composition
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)
KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.