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Alunite
Alunite

Atacamite
Atacamite



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Alunite
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Atacamite

Alunite and Atacamite 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
-
-
3.745-3.776
Conchoidal
Perfect on {010}, fair on {101}
3-3.5
Cu2Cl(OH)3

Alunite and Atacamite Chemical Formula

While comparing Alunite and Atacamite 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 Atacamite chemical formula.

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Alunite and Atacamite Specific Gravity

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