Austinite and Sodalite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Easily soluble in cold dilute HCl
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
4.12
  
2.15-2.40
  
Fracture
Brittle, Uneven, Brittle, Uneven
  
Conchoidal, Uneven, UnevenArthur Thomas, Brittle
  
Cleavage
Good in two directions parallel to the prism faces {110}
  
Poor on {110}
  
Mohs Hardness
4-4.5
  
5-6
  
Chemical Composition
CaZn(AsO4)(OH)
  
Na8Al6Si6O24Cl2
  
Austinite and Sodalite Chemical Formula
While comparing Austinite and Sodalite 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 Austinite and Sodalite chemical formula.
- Chemical formula of Austinite- CaZn(AsO4)(OH)
- Chemical formula of Sodalite- Na8Al6Si6O24Cl2
Austinite and Sodalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Austinite and Sodalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Austinite and Sodalite Optical Properties during the identification of gemstone. Specific gravity of Austinite is 2.15-2.40 whereas that of Sodalite is 2.15-2.40.