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Sodalite
Sodalite

Alunite
Alunite



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Sodalite
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Alunite

Sodalite and Alunite Physical Properties

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1 Physical Properties
1.1 Tenacity
Brittle
Brittle
1.2 Solubility
Soluble
Soluble
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.15-2.402.6-2.9
Amber
1 7.18
1.5 Fracture
Conchoidal, Uneven, UnevenArthur Thomas, Brittle
Conchoidal, Uneven
1.6 Cleavage
Poor on {110}
On {0001}, perfect
1.7 Mohs Hardness
5-63.5-4
Amber
2 10
1.8 Chemical Composition
Na8Al6Si6O24Cl2
KAl3(SO4)2(OH)6

Sodalite and Alunite Chemical Formula

While comparing Sodalite and Alunite 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 Sodalite and Alunite chemical formula.

  • Chemical formula of Sodalite- Na8Al6Si6O24Cl2
  • Chemical formula of Alunite- KAl3(SO4)2(OH)6

Sodalite and Alunite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sodalite and Alunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sodalite and Alunite Optical Properties during the identification of gemstone. Specific gravity of Sodalite is 2.6-2.9 whereas that of Alunite is 2.6-2.9.