Biotite and Norbergite Physical Properties

Biotite and Norbergite Chemical Formula

While comparing Biotite and Norbergite 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 Norbergite chemical formula.

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

Biotite and Norbergite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Norbergite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Norbergite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 3.177 whereas that of Norbergite is 3.177.