Tenacity
-
-
Solubility
-
Soluble
Durability
-
-
Specific Gravity
5.51.847-1.852
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
Poor to indistinct on {010}
Mohs Hardness
5-5.52-3
2
10
👆🏻
Chemical Composition
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca3Al3(SiO4)3(OH)