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Alunite and Sodalite Physical Properties


Sodalite and Alunite Physical Properties


Physical Properties

Tenacity
Brittle   
Brittle   

Solubility
Soluble   
Soluble   

Durability
Not Available   
Not Available   

Specific Gravity
2.6-2.9   
2.15-2.40   

Fracture
Conchoidal, Uneven   
Conchoidal, Uneven, UnevenArthur Thomas, Brittle   

Cleavage
On {0001}, perfect   
Poor on {110}   

Mohs Hardness
3.5-4   
5-6   

Chemical Composition
KAl3(SO4)2(OH)6   
Na8Al6Si6O24Cl2   

Optical Properties >>
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Alunite and Sodalite Chemical Formula

While comparing Alunite 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 Alunite and Sodalite chemical formula.

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Alunite and Sodalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alunite and Sodalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Sodalite Optical Properties during the identification of gemstone. Specific gravity of Alunite is 2.15-2.40 whereas that of Sodalite is 2.15-2.40.

Red Gemstones

Red Gemstones


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