Legrandite and Vivianite Physical Properties

Legrandite

Vivianite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.98-4.042.64-2.70

1 7.18

1.5 Fracture

Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle

(e.g. graphite).

1.6 Cleavage

Imperfect, poor one {100}

{010} Perfect

1.7 Mohs Hardness

4.5-5Not Available

2 10

1.8 Chemical Composition

Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Legrandite and Vivianite Chemical Formula

While comparing Legrandite 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 Legrandite and Vivianite chemical formula.

Chemical formula of Legrandite- Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

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Legrandite and Vivianite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Legrandite and Vivianite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Legrandite and Vivianite Optical Properties during the identification of gemstone. Specific gravity of Legrandite is 2.64-2.70 whereas that of Vivianite is 2.64-2.70.