Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.33-2.373.19-3.56
1
7.18
👆🏻
Fracture
Uneven
Uneven, Conchoidal
Cleavage
Perfect on {001}, imperfect on {110}
{110} Perfect, {010} Indistinct
Mohs Hardness
4.5-55.5-6
2
10
👆🏻
Chemical Composition
(K,Na)Ca4Si8O20(F,OH)•8(H2O)
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)