Biotite and Phosphophyllite Physical Properties

Biotite

Phosphophyllite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

2.7-3.33.07-3.13

1 7.18

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Fracture

Uneven, Even

Conchoidal, Uneven

Cleavage

Perfect on the {001}

{100} Perfect, {010} Distinct, {102} Distinct

Mohs Hardness

2.5-3.03-3.5

2 10

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Chemical Composition

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

Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Biotite and Phosphophyllite Chemical Formula

While comparing Biotite and Phosphophyllite 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 Phosphophyllite chemical formula.

Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
Chemical formula of Phosphophyllite- Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Biotite and Phosphophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Phosphophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Phosphophyllite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 3.07-3.13 whereas that of Phosphophyllite is 3.07-3.13.