Andradite and Vivianite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.70-4.10
2.64-2.70
Fracture
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)
(e.g. graphite).
Cleavage
none
{010} Perfect
Mohs Hardness
6.5-7
Not Available
Chemical Composition
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Andradite and Vivianite Chemical Formula
While comparing Andradite 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 Andradite and Vivianite chemical formula.
- Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
- Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Andradite and Vivianite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Andradite and Vivianite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andradite and Vivianite Optical Properties during the identification of gemstone. Specific gravity of Andradite is 2.64-2.70 whereas that of Vivianite is 2.64-2.70.