Allanite and Pyromorphite Physical Properties

Allanite and Pyromorphite Chemical Formula

While comparing Allanite and Pyromorphite 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 Allanite and Pyromorphite chemical formula.

• Chemical formula of Allanite- Ca(Ce,La,Y,Ca)Al2(Fe,Al)Si3O12(OH)
• Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)

Allanite and Pyromorphite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Allanite and Pyromorphite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Allanite and Pyromorphite Optical Properties during the identification of gemstone. Specific gravity of Allanite is 6.5-7.1 whereas that of Pyromorphite is 6.5-7.1.