Biotite and Microlite Physical Properties

Biotite

Microlite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

2.7-3.35.5

1 7.18

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Fracture

Uneven, Even

Conchoidal

Cleavage

Perfect on the {001}

{111} Indistinct, {111} Indistinct, {111} Indistinct

Mohs Hardness

2.5-3.05-5.5

2 10

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Chemical Composition

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

(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Biotite and Microlite Chemical Formula

While comparing Biotite and Microlite 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 Biotite and Microlite chemical formula.

Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
Chemical formula of Microlite- (Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Biotite and Microlite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Microlite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Microlite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 5.5 whereas that of Microlite is 5.5.