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Alunite
Alunite

Friedelite
Friedelite



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Alunite
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Friedelite

Alunite and Friedelite Physical Properties

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
 
-
-
-
3.06-3.19
Uneven
{010} Perfect
4-5
Mn 8Si 6O 15(OH,Cl) 10Ulrich Henn and Claudio C.

Alunite and Friedelite Chemical Formula

While comparing Alunite and Friedelite 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 Friedelite chemical formula.

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Alunite and Friedelite Specific Gravity

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