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Alunite
Alunite
☒

Poldervaartite
Poldervaartite
☒



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Alunite
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Poldervaartite

Alunite and Poldervaartite 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
 
-
-
-
2.91
-
None
-9999
(Ca,Mn2+ ) 2(SiO 3OH)(OH)Anthony et al , Handbook of Mineralogy (2001)

Alunite and Poldervaartite Chemical Formula

While comparing Alunite and Poldervaartite 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 Poldervaartite chemical formula.

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Alunite and Poldervaartite Specific Gravity

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