Biotite and Pumpellyite Physical Properties

Biotite and Pumpellyite Chemical Formula

While comparing Biotite and Pumpellyite 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 Pumpellyite chemical formula.

• Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
• Chemical formula of Pumpellyite- Ca 2(Mg,Fe,Mn,Al) 2(SiO 4)(Si 2O 7)(OH) 2 · H 2OUlrich Henn and Claudio C.

Biotite and Pumpellyite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Pumpellyite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Pumpellyite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 3.20-3.30 whereas that of Pumpellyite is 3.20-3.30.