Physical Properties
Tenacity
Brittle
-
Solubility
-
insoluble in common solvents
Durability
-
-
Specific Gravity
3.50-3.602.65
1
7.18
👆🏻
Fracture
Uneven
Conchoidal, ConchoidalWalter Schumann
Cleavage
Good on {110}, (110) ^ (1 1 0) ≈87°; parting on {100}
Indiscernible
Mohs Hardness
67
2
10
👆🏻
Chemical Composition
(Na,Fe,Ca)Si 2O 6Ulrich Henn and Claudio C.
SiO2