Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
-99996.50-7.00
1
7.18
👆🏻
Fracture
Conchoidal
Irregular, Conchoidal
Cleavage
None
On {011}, distinct; on {001}, {013}, indistinct
Mohs Hardness
7-7.53
2
10
👆🏻
Chemical Composition
Al 4(Ta,Nb) 3(O,OH,F) 14Ulrich Henn and Claudio C.
PbMoO 4Walter Schumann , Gemstones of the world (2001)