Vivianite and Austinite Physical Properties

Vivianite

Austinite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Easily soluble in cold dilute HCl

1.3 Durability

Not Available

1.4 Specific Gravity

2.64-2.704.12

1 7.18

1.5 Fracture

(e.g. graphite).

Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

{010} Perfect

Good in two directions parallel to the prism faces {110}

1.7 Mohs Hardness

Not Available4-4.5

2 10

1.8 Chemical Composition

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

CaZn(AsO4)(OH)

Vivianite and Austinite Chemical Formula

While comparing Vivianite and Austinite 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 Austinite chemical formula.

Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Chemical formula of Austinite- CaZn(AsO4)(OH)

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Vivianite and Austinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Vivianite and Austinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Austinite Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 4.12 whereas that of Austinite is 4.12.