Apophyllite KF and Vivianite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.33-2.37
  
2.64-2.70
  
Fracture
Uneven, Brittle, Uneven, Brittle, Uneven
  
(e.g. graphite).
  
Cleavage
Perfect on {001}, imperfect on {110}
  
{010} Perfect
  
Mohs Hardness
4.5-5
  
Not Available
  
Chemical Composition
(K,Na)Ca4Si8O20(F,OH)•8(H2O)
  
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
  
Apophyllite KF and Vivianite Chemical Formula
While comparing Apophyllite KF and Vivianite 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 Apophyllite KF and Vivianite chemical formula.
- Chemical formula of Apophyllite KF- (K,Na)Ca4Si8O20(F,OH)•8(H2O)
- Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Apophyllite KF and Vivianite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Apophyllite KF and Vivianite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apophyllite KF and Vivianite Optical Properties during the identification of gemstone. Specific gravity of Apophyllite KF is 2.64-2.70 whereas that of Vivianite is 2.64-2.70.