1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Gelatinises in acids
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Conchoidal, Brittle, Conchoidal
Uneven, Conchoidal, Brittle
1.6 Cleavage
Good on [110] and on [001]
Distinct on {110}
1.7 Mohs Hardness
1.8 Chemical Composition
[ ]Na2(Mg3Al2)Si8O22(OH)2
(Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2