Biotite and Papagoite Physical Properties

Biotite

Papagoite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.7-3.33.25

1 7.18

1.5 Fracture

Uneven, Even, Yellow, White

Brittle, Metallic

1.6 Cleavage

Perfect on the {001}

Imperfect in one direction

1.7 Mohs Hardness

2.5-3.05-5.5

2 10

1.8 Chemical Composition

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

CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)

Biotite and Papagoite Chemical Formula

While comparing Biotite and Papagoite 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 Papagoite chemical formula.

Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
Chemical formula of Papagoite- CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)

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Biotite and Papagoite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Papagoite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Papagoite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 3.25 whereas that of Papagoite is 3.25.