Vivianite and Goethite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
HCl soluble
Durability
Not Available
Not Available
Specific Gravity
2.64-2.70
4.27-4.29
Fracture
(e.g. graphite).
Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).
Cleavage
{010} Perfect
Perfect {010}
Mohs Hardness
Not Available
5-5.5
Chemical Composition
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
FeO(OH)Arthur Thomas , Gemstones (2009)
Vivianite and Goethite Chemical Formula
While comparing Vivianite and Goethite 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 Goethite chemical formula.
- Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
- Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
Vivianite and Goethite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Vivianite and Goethite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Goethite Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 4.27-4.29 whereas that of Goethite is 4.27-4.29.