Sylvite and Tantalite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
1.993
  
5.2
  
Fracture
Uneven, Brittle
  
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
Perfect on [100], [010], [001]
  
Good in one direction
  
Mohs Hardness
2.5
  
6-6.5
  
Chemical Composition
Not Available
  
(Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references
  
Sylvite and Tantalite Chemical Formula
While comparing Sylvite and Tantalite 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 Sylvite and Tantalite chemical formula.
>- Chemical formula of Tantalite- (Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references
Sylvite and Tantalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sylvite and Tantalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sylvite and Tantalite Optical Properties during the identification of gemstone. Specific gravity of Sylvite is 5.2 whereas that of Tantalite is 5.2.