Vivianite and Chromite Physical Properties

Vivianite

Chromite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.64-2.704.5-4.8

1 7.18

1.5 Fracture

(e.g. graphite).

Uneven

1.6 Cleavage

{010} Perfect

None, parting may develop along {111}

1.7 Mohs Hardness

Not Available5.5

2 10

1.8 Chemical Composition

Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

Fe++Cr2O4

Vivianite and Chromite Chemical Formula

While comparing Vivianite and Chromite 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 Chromite chemical formula.

Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Chemical formula of Chromite- Fe++Cr2O4

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Vivianite and Chromite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Vivianite and Chromite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Chromite Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 4.5-4.8 whereas that of Chromite is 4.5-4.8.