Alunite and Beudantite Physical Properties

Alunite

Beudantite

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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

2.6-2.94.48

1 7.18

1.5 Fracture

Conchoidal, Uneven

Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

On {0001}, perfect

distinct; good on {0001}

1.7 Mohs Hardness

3.5-43.5-4.5

2 10

1.8 Chemical Composition

KAl3(SO4)2(OH)6

PbFe+++3(AsO4)(SO4)(OH)6

Alunite and Beudantite Chemical Formula

While comparing Alunite and Beudantite 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 Beudantite chemical formula.

Chemical formula of Alunite- KAl3(SO4)2(OH)6
Chemical formula of Beudantite- PbFe+++3(AsO4)(SO4)(OH)6

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Alunite and Beudantite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alunite and Beudantite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Beudantite Optical Properties during the identification of gemstone. Specific gravity of Alunite is 4.48 whereas that of Beudantite is 4.48.