Apatite and Franklinite Physical Properties

Apatite and Franklinite Chemical Formula

While comparing Apatite and Franklinite 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 Apatite and Franklinite chemical formula.

• Chemical formula of Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
• Chemical formula of Franklinite- (Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)

Apatite and Franklinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Franklinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Franklinite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 5.05-5.22 whereas that of Franklinite is 5.05-5.22.