Vivianite and Sillimanite Physical Properties

Vivianite and Sillimanite Chemical Formula

While comparing Vivianite and Sillimanite 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 Vivianite and Sillimanite chemical formula.

• Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
• Chemical formula of Sillimanite- Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)

Vivianite and Sillimanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Vivianite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.