Vivianite and Afghanite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.64-2.70
2.55-2.65
Fracture
(e.g. graphite).
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle, Conchoidal, Brittle
Cleavage
{010} Perfect
Perfect {10 1 0}
Mohs Hardness
Not Available
5.5-6
Chemical Composition
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
Vivianite and Afghanite Chemical Formula
While comparing Vivianite and Afghanite 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 Afghanite chemical formula.
- Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
- Chemical formula of Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
Vivianite and Afghanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Vivianite and Afghanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Afghanite Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 2.55-2.65 whereas that of Afghanite is 2.55-2.65.