Biotite and Wavellite Physical Properties

Biotite

Wavellite

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Physical Properties

Tenacity

Brittle

Solubility

insoluble

Durability

Specific Gravity

2.7-3.32.36

1 7.18

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Fracture

Uneven, Even

Uneven, Subconchoidal, Fibrous

Cleavage

Perfect on the {001}

[110] perfect, [101] good, [010] distinct

Mohs Hardness

2.5-3.03.5-4

2 10

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Chemical Composition

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

Al 3(PO 4) 2(OH,F) 3 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Biotite and Wavellite Chemical Formula

While comparing Biotite and Wavellite 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 Wavellite chemical formula.

Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
Chemical formula of Wavellite- Al 3(PO 4) 2(OH,F) 3 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Biotite and Wavellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Wavellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Wavellite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 2.36 whereas that of Wavellite is 2.36.