Zinnwaldite and Biotite Physical Properties

Zinnwaldite

Biotite

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1 Physical Properties

1.1 Tenacity

Elastic

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.9-3.12.7-3.3

1 7.18

1.5 Fracture

Uneven

Uneven, Even, Yellow, White

1.6 Cleavage

Perfect basal {001}

Perfect on the {001}

1.7 Mohs Hardness

3.5-4.02.5-3.0

2 10

1.8 Chemical Composition

Not Available

K(Mg,Fe++)3[AlSi3O10(OH,F)2

Zinnwaldite and Biotite Chemical Formula

While comparing Zinnwaldite and Biotite 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 Zinnwaldite and Biotite chemical formula.

Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2

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Zinnwaldite and Biotite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Zinnwaldite and Biotite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Zinnwaldite and Biotite Optical Properties during the identification of gemstone. Specific gravity of Zinnwaldite is 2.7-3.3 whereas that of Biotite is 2.7-3.3.