Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.05-3.082.9-3.5
1
7.18
👆🏻
Fracture
Uneven, Irregular, Conchoidal
Conchoidal
Cleavage
None
{110} Perfect, {???} Distinct, {???} Distinct
Mohs Hardness
6.55.5-6
2
10
👆🏻
Chemical Composition
Ca 3Al 2(SiO 4) 3-x(OH) 4x (x=0.2 to 1.5)Anthony et al , Handbook of mineralogy (2001)
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)