Biotite and Esperite Physical Properties

Biotite and Esperite Chemical Formula

While comparing Biotite and Esperite 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 Esperite chemical formula.

• Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
• Chemical formula of Esperite- PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)

Biotite and Esperite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Esperite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Esperite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 4.28-4.42 whereas that of Esperite is 4.28-4.42.