Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.53-3.15
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
Good on [110] and on [001]
Mohs Hardness
5-5.56.0-6.5
2
10
👆🏻
Chemical Composition
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
[ ]Na2(Mg3Al2)Si8O22(OH)2