Neptunite and Vivianite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.19-3.23
2.64-2.70
Fracture
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
(e.g. graphite).
Cleavage
{110} good
{010} Perfect
Mohs Hardness
5-6
Not Available
Chemical Composition
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Neptunite and Vivianite Chemical Formula
While comparing Neptunite and Vivianite 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 Neptunite and Vivianite chemical formula.
- Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Neptunite and Vivianite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Neptunite and Vivianite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Neptunite and Vivianite Optical Properties during the identification of gemstone. Specific gravity of Neptunite is 2.64-2.70 whereas that of Vivianite is 2.64-2.70.