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Helenite
Helenite

Alunite
Alunite



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Helenite
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Alunite

Helenite and Alunite Physical Properties

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1 Physical Properties
1.1 Tenacity
Not Available
Brittle
1.2 Solubility
Not Available
Soluble
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
Not Available2.6-2.9
Amber
1 7.18
1.5 Fracture
Not Available
Conchoidal, Uneven
1.6 Cleavage
Not Available
On {0001}, perfect
1.7 Mohs Hardness
Not Available3.5-4
Amber
2 10
1.8 Chemical Composition
Not Available
KAl3(SO4)2(OH)6

Helenite and Alunite Chemical Formula

While comparing Helenite 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 Helenite and Alunite chemical formula.

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  • Chemical formula of Alunite- KAl3(SO4)2(OH)6

Helenite and Alunite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Helenite and Alunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Helenite and Alunite Optical Properties during the identification of gemstone. Specific gravity of Helenite is 2.6-2.9 whereas that of Alunite is 2.6-2.9.