Biotite and Brazilianite Physical Properties

Biotite and Brazilianite Chemical Formula

While comparing Biotite and Brazilianite 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 Brazilianite chemical formula.

• Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
• Chemical formula of Brazilianite- NaAl 3(PO 4) 2(OH) 4Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Biotite and Brazilianite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Brazilianite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Brazilianite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 2.98-2.99 whereas that of Brazilianite is 2.98-2.99.