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Kurnakovite
Kurnakovite

Alunite
Alunite



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Kurnakovite
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Alunite

Kurnakovite and Alunite Physical Properties

Physical Properties

Tenacity

-
Brittle

Solubility

Soluble
Soluble

Durability

-
-

Specific Gravity

1.847-1.8522.6-2.9
1 7.18
👆🏻

Fracture

Conchoidal
Conchoidal, Uneven

Cleavage

Poor to indistinct on {010}
On {0001}, perfect

Mohs Hardness

2-33.5-4
2 10
👆🏻

Chemical Composition

Ca3Al3(SiO4)3(OH)
KAl3(SO4)2(OH)6

Kurnakovite and Alunite Chemical Formula

While comparing Kurnakovite 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 Kurnakovite and Alunite chemical formula.

  • Chemical formula of Kurnakovite- Ca3Al3(SiO4)3(OH)
  • Chemical formula of Alunite- KAl3(SO4)2(OH)6

Kurnakovite and Alunite Specific Gravity

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