Afghanite and Nepheline Physical Properties

Afghanite and Nepheline Chemical Formula

While comparing Afghanite and Nepheline 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 Afghanite and Nepheline chemical formula.

• Chemical formula of Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
• Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.

Afghanite and Nepheline Specific Gravity

Another important criteria for qualitative analysis of gemstones is Afghanite and Nepheline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Afghanite and Nepheline Optical Properties during the identification of gemstone. Specific gravity of Afghanite is 2.55-2.65 whereas that of Nepheline is 2.55-2.65.