Poudretteite and Stibiotantalite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.51-2.53
  
Not Available
  
Fracture
Conchoidal, Splintery
  
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
  
Cleavage
None
  
{???} Perfect
  
Mohs Hardness
5
  
5.5-6
  
Chemical Composition
KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)
  
SbTaO 4Ulrich Henn and Claudio C.
  
Poudretteite and Stibiotantalite Chemical Formula
While comparing Poudretteite and Stibiotantalite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Poudretteite and Stibiotantalite chemical formula.
- Chemical formula of Poudretteite- KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Stibiotantalite- SbTaO 4Ulrich Henn and Claudio C.
Poudretteite and Stibiotantalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Poudretteite and Stibiotantalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Poudretteite and Stibiotantalite Optical Properties during the identification of gemstone. Specific gravity of Poudretteite is Not Available whereas that of Stibiotantalite is Not Available.