Biotite and Anthophyllite Physical Properties

Biotite and Anthophyllite Chemical Formula

While comparing Biotite and Anthophyllite 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 Anthophyllite chemical formula.

• Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
• Chemical formula of Anthophyllite- (Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

Biotite and Anthophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Biotite and Anthophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Anthophyllite Optical Properties during the identification of gemstone. Specific gravity of Biotite is 2.9-3.5 whereas that of Anthophyllite is 2.9-3.5.