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Alunite
Alunite

Austinite
Austinite



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Alunite
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Austinite

Alunite and Austinite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
Soluble
-
2.6-2.9
Conchoidal, Uneven
On {0001}, perfect
3.5-4
KAl3(SO4)2(OH)6
 
Brittle
Easily soluble in cold dilute HCl
-
4.12
Uneven
Good in two directions parallel to the prism faces {110}
4-4.5
CaZn(AsO4)(OH)

Alunite and Austinite Chemical Formula

While comparing Alunite and Austinite 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 Austinite chemical formula.

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Alunite and Austinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alunite and Austinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite Vs Austinite during the identification of gemstone. Specific gravity of Alunite is whereas that of Austinite is .