Vivianite and Tantalite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.64-2.70
  
5.2
  
Fracture
(e.g. graphite).
  
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
{010} Perfect
  
Good in one direction
  
Mohs Hardness
Not Available
  
6-6.5
  
Chemical Composition
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
  
(Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references
  
Vivianite and Tantalite Chemical Formula
While comparing Vivianite 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 Vivianite and Tantalite chemical formula.
- Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
- Chemical formula of Tantalite- (Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references
Vivianite and Tantalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Vivianite and Tantalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Tantalite Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 5.2 whereas that of Tantalite is 5.2.