Vivianite and Purpurite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.64-2.70
3.2-3.4
Fracture
(e.g. graphite).
Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle
Cleavage
{010} Perfect
[100] [001] perfect
Mohs Hardness
Not Available
4-4.5
Chemical Composition
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Vivianite and Purpurite Chemical Formula
While comparing Vivianite and Purpurite 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 Purpurite chemical formula.
- Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
- Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Vivianite and Purpurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Vivianite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.