Vivianite and Achroite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.64-2.70
2.90-3.40
Fracture
(e.g. graphite).
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Cleavage
{010} Perfect
Not Available
Mohs Hardness
Not Available
7-7.5
Chemical Composition
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Vivianite and Achroite Chemical Formula
While comparing Vivianite and Achroite 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 Achroite chemical formula.
- Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
- Chemical formula of Achroite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Vivianite and Achroite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Vivianite and Achroite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Achroite Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 2.90-3.40 whereas that of Achroite is 2.90-3.40.