Biotite and Linarite Physical Properties

Biotite

Linarite

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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

2.7-3.35.35

1 7.18

1.5 Fracture

Uneven, Even, Yellow, White

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle

1.6 Cleavage

Perfect on the {001}

Perfect on {100}, imperfect on {001}

1.7 Mohs Hardness

2.5-3.02.5

2 10

1.8 Chemical Composition

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

PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

Biotite and Linarite Chemical Formula

While comparing Biotite and Linarite 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 Linarite chemical formula.

Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
Chemical formula of Linarite- PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

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Biotite and Linarite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Linarite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Linarite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 5.35 whereas that of Linarite is 5.35.