Vivianite and Ettringite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Partially soluble in water
Durability
Not Available
Not Available
Specific Gravity
2.64-2.70
1.77
Fracture
(e.g. graphite).
Not Available
Cleavage
{010} Perfect
Perfect on {10 1 0}
Mohs Hardness
Not Available
2-2.5
Chemical Composition
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Vivianite and Ettringite Chemical Formula
While comparing Vivianite and Ettringite 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 Ettringite chemical formula.
- Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
- Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Vivianite and Ettringite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Vivianite and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 1.77 whereas that of Ettringite is 1.77.