Mottramite and Alunite Physical Properties

Mottramite and Alunite Chemical Formula

While comparing Mottramite and Alunite 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 Mottramite and Alunite chemical formula.

• Chemical formula of Mottramite- PbCu(VO4)(OH)
• Chemical formula of Alunite- KAl3(SO4)2(OH)6

Mottramite and Alunite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Mottramite and Alunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Mottramite and Alunite Optical Properties during the identification of gemstone. Specific gravity of Mottramite is 2.6-2.9 whereas that of Alunite is 2.6-2.9.