Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.52.2-2.6
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
None
Mohs Hardness
5-5.53-4
2
10
👆🏻
Chemical Composition
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Fe+++,Al)25(PO4)17O6(OH)12•75(H2O)