Allanite and Biotite Physical Properties

Allanite

Biotite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.40-4.202.7-3.3

1 7.18

1.5 Fracture

Not Available

Uneven, Even, Yellow, White

1.6 Cleavage

Not Available

Perfect on the {001}

1.7 Mohs Hardness

Not Available2.5-3.0

2 10

1.8 Chemical Composition

Not Available

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

Allanite and Biotite Chemical Formula

While comparing Allanite 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 Allanite and Biotite chemical formula.

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

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Allanite and Biotite Specific Gravity

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