Vivianite and Erythrite Physical Properties

Vivianite

Erythrite

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1 Physical Properties

1.1 Tenacity

Not Available

Sectile

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.64-2.703.06

1 7.18

1.5 Fracture

(e.g. graphite).

Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).

1.6 Cleavage

{010} Perfect

Perfect on {010}; poor on {100} and { 1 02}.

1.7 Mohs Hardness

Not AvailableNot Available

2 10

1.8 Chemical Composition

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

Co3(AsO4)2•8(H2O)

Vivianite and Erythrite Chemical Formula

While comparing Vivianite and Erythrite 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 Erythrite chemical formula.

Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)

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Vivianite and Erythrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Vivianite and Erythrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Erythrite Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 3.06 whereas that of Erythrite is 3.06.