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Vivianite and Sillimanite Physical Properties


Sillimanite and Vivianite Physical Properties


Physical Properties

Tenacity
Not Available   
Tough   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.64-2.70   
3.20-3.26   

Fracture
(e.g. graphite).   
Splintery   

Cleavage
{010} Perfect   
{010} perfect   

Mohs Hardness
Not Available   
6-7.5   

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

Optical Properties >>
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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.

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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.

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