Alunite and Albite Physical Properties

Alunite

Albite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

Not Available

1.2 Durability

Not Available

1.5 Specific Gravity

2.6-2.92.60-2.65

1 7.18

1.15 Fracture

Conchoidal, Uneven

Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal

1.16 Cleavage

On {0001}, perfect

Perfect on {001}, very good on {010}, imperfect on {110}

1.17 Mohs Hardness

3.5-46-6.5

2 10

1.18 Chemical Composition

KAl3(SO4)2(OH)6

NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Alunite and Albite Chemical Formula

While comparing Alunite and Albite 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 Albite chemical formula.

Chemical formula of Alunite- KAl3(SO4)2(OH)6
Chemical formula of Albite- NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

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Alunite and Albite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alunite and Albite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Albite Optical Properties during the identification of gemstone. Specific gravity of Alunite is 2.60-2.65 whereas that of Albite is 2.60-2.65.