Biotite and Catapleiite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.7-3.3
2.72
Fracture
Uneven, Even, Yellow, White
Brittle, Metallic, Brittle, Metallic
Cleavage
Perfect on the {001}
{110} Perfect, {010} Perfect
Mohs Hardness
2.5-3.0
5-6
Chemical Composition
K(Mg,Fe++)3[AlSi3O10(OH,F)2
Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Biotite and Catapleiite Chemical Formula
While comparing Biotite and Catapleiite 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 Catapleiite chemical formula.
- Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
- Chemical formula of Catapleiite- Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Biotite and Catapleiite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Biotite and Catapleiite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Catapleiite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 2.72 whereas that of Catapleiite is 2.72.