Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.74-2.902.9-3.5
1
7.18
👆🏻
Fracture
Uneven, Splintery
Conchoidal
Cleavage
Perfect on {100} and {001}
{110} Perfect, {???} Distinct, {???} Distinct
Mohs Hardness
4.5-55.5-6
2
10
👆🏻
Chemical Composition
Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)