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Vivianite and Polyhalite Physical Properties


Polyhalite and Vivianite Physical Properties


Physical Properties

Tenacity
Not Available   
Brittle   

Solubility
Not Available   
Soluble   

Durability
Not Available   
Not Available   

Specific Gravity
2.64-2.70   
2.78   

Fracture
(e.g. graphite).   
Conchoidal, Brittle   

Cleavage
{010} Perfect   
Perfect on {10 1 }; parting on {010}   

Mohs Hardness
Not Available   
3.5   

Chemical Composition
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.   
Not Available   

Optical Properties >>
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Vivianite and Polyhalite Chemical Formula

While comparing Vivianite and Polyhalite 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 Polyhalite chemical formula.

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Vivianite and Polyhalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Vivianite and Polyhalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Polyhalite Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 2.78 whereas that of Polyhalite is 2.78.

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