Afghanite and Astrophyllite Physical Properties

Afghanite and Astrophyllite Chemical Formula

While comparing Afghanite and Astrophyllite 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 Astrophyllite 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 Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

Afghanite and Astrophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Afghanite and Astrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Afghanite and Astrophyllite Optical Properties during the identification of gemstone. Specific gravity of Afghanite is 3.2-3.4 whereas that of Astrophyllite is 3.2-3.4.