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Franklinite
Franklinite

Alunite
Alunite



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Franklinite
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Alunite

Franklinite and Alunite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
5.05-5.22
Uneven
None
5.5-6
(Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
 
Brittle
Soluble
-
2.6-2.9
Conchoidal, Uneven
On {0001}, perfect
3.5-4
KAl3(SO4)2(OH)6

Franklinite and Alunite Chemical Formula

While comparing Franklinite 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 Franklinite and Alunite chemical formula.

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Franklinite and Alunite Specific Gravity

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