Legrandite and Sodalite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Not Available
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.98-4.04
  
2.15-2.40
  
Fracture
Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle
  
Conchoidal, Uneven, UnevenArthur Thomas, Brittle
  
Cleavage
Imperfect, poor one {100}
  
Poor on {110}
  
Mohs Hardness
4.5-5
  
5-6
  
Chemical Composition
Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
  
Na8Al6Si6O24Cl2
  
Legrandite and Sodalite Chemical Formula
While comparing Legrandite 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 Legrandite and Sodalite chemical formula.
- Chemical formula of Legrandite- Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Sodalite- Na8Al6Si6O24Cl2
Legrandite and Sodalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Legrandite and Sodalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Legrandite and Sodalite Optical Properties during the identification of gemstone. Specific gravity of Legrandite is 2.15-2.40 whereas that of Sodalite is 2.15-2.40.