Allanite and Achroite Physical Properties

Allanite and Achroite Chemical Formula

While comparing Allanite and Achroite 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 Achroite chemical formula.

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• Chemical formula of Achroite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.

Allanite and Achroite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Allanite and Achroite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Allanite and Achroite Optical Properties during the identification of gemstone. Specific gravity of Allanite is 2.90-3.40 whereas that of Achroite is 2.90-3.40.