Biotite and Allanite Physical Properties

Biotite

Allanite

Add ⊕

1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.7-3.33.40-4.20

1 7.18

1.5 Fracture

Uneven, Even, Yellow, White

Not Available

1.6 Cleavage

Perfect on the {001}

Not Available

1.7 Mohs Hardness

2.5-3.0Not Available

2 10

1.8 Chemical Composition

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

Not Available

Biotite and Allanite Chemical Formula

While comparing Biotite and Allanite 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 Allanite chemical formula.

Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2

Compare Yellow Gemstones

Biotite Vs Hauyne

Biotite Vs Hanksite

Biotite Vs Gyrolite

Biotite and Allanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Allanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Allanite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 3.40-4.20 whereas that of Allanite is 3.40-4.20.