Tenacity
-
Brittle
Solubility
-
Gelatinises in acids
Durability
-
-
Specific Gravity
3.19-3.562.4-2.5
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Uneven, Conchoidal
Cleavage
{110} Perfect, {010} Indistinct
Distinct on {110}
Mohs Hardness
5.5-65-6
2
10
👆🏻
Chemical Composition
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)
(Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2