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Phlogopite
Phlogopite

Biotite
Biotite



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Phlogopite
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Biotite

Phlogopite and Biotite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Tough
-
-
2.78-2.85
Uneven
Perfect basal (001)
2-2.5
KMg3(Si3Al)O10(F,OH)2
 
Brittle
-
-
2.7-3.3
Uneven, Even
Perfect on the {001}
2.5-3.0
K(Mg,Fe++)3[AlSi3O10(OH,F)2

Phlogopite and Biotite Chemical Formula

While comparing Phlogopite 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 Phlogopite and Biotite chemical formula.

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Phlogopite and Biotite Specific Gravity

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