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
Uneven, Brittle, Metallic, Brittle, Metallic, Brittle, Metallic
Uneven, Conchoidal, Brittle
1.6 Cleavage
Good on {110}, (110) ^ (1 1 0) ≈87°; parting on {100}
Distinct on {110}
1.7 Mohs Hardness
1.8 Chemical Composition
(Na,Fe,Ca)Si 2O 6Ulrich Henn and Claudio C.
(Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2