Alunite and Axinite Physical Properties

Alunite

Axinite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.93.26-3.36

1 7.18

1.5 Fracture

Conchoidal, Uneven

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

On {0001}, perfect

Good on {100}

1.7 Mohs Hardness

3.5-46.5-7

2 10

1.8 Chemical Composition

KAl3(SO4)2(OH)6

(Ca,Fe,Mn,Mg) 3Al 2BSi 4O 15(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Alunite and Axinite Chemical Formula

While comparing Alunite and Axinite 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 Axinite chemical formula.

Chemical formula of Alunite- KAl3(SO4)2(OH)6
Chemical formula of Axinite- (Ca,Fe,Mn,Mg) 3Al 2BSi 4O 15(OH)Walter Schumann , Gemstones of the world (2001) More from other references

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Alunite and Axinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alunite and Axinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Axinite Optical Properties during the identification of gemstone. Specific gravity of Alunite is 3.26-3.36 whereas that of Axinite is 3.26-3.36.