Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
5.52.57-2.66
1
7.18
👆🏻
Fracture
Conchoidal
Subconchoidal, Conchoidal
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
Fair on {100}, poor on {001} and {010}
Mohs Hardness
5-5.57-7.5
2
10
👆🏻
Chemical Composition
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Mg2Al4Si5O18