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Chalcopyrite
Chalcopyrite

Alunite
Alunite



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Chalcopyrite
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Alunite

Chalcopyrite and Alunite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

Soluble
Soluble

Durability

-
-

Specific Gravity

4.1-4.32.6-2.9
1 7.18
👆🏻

Fracture

Uneven
Conchoidal, Uneven

Cleavage

Indistinct on {011}
On {0001}, perfect

Mohs Hardness

3.5-43.5-4
2 10
👆🏻

Chemical Composition

CuFeS 2Anthony et al , Handbook of mineralogy (2001)
KAl3(SO4)2(OH)6

Chalcopyrite and Alunite Chemical Formula

While comparing Chalcopyrite 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 Chalcopyrite and Alunite chemical formula.

  • Chemical formula of Chalcopyrite- CuFeS 2Anthony et al , Handbook of mineralogy (2001)
  • Chemical formula of Alunite- KAl3(SO4)2(OH)6

Chalcopyrite and Alunite Specific Gravity

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