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Mottramite
Mottramite

Alunite
Alunite



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Mottramite
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Alunite

Mottramite and Alunite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
Soluble
-
5.9
Sub-Conchoidal
None observed
3
PbCu(VO4)(OH)
 
Brittle
Soluble
-
2.6-2.9
Conchoidal, Uneven
On {0001}, perfect
3.5-4
KAl3(SO4)2(OH)6

Mottramite and Alunite Chemical Formula

While comparing Mottramite 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 Mottramite and Alunite chemical formula.

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Mottramite and Alunite Specific Gravity

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