Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
1.793.19-3.56
1
7.18
👆🏻
Fracture
Irregular/uneven
Uneven, Conchoidal
Cleavage
Perfect on {10bar10}
{110} Perfect, {010} Indistinct
Mohs Hardness
2.55.5-6
2
10
👆🏻
Chemical Composition
Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O)
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)