Austinite and Brookite Physical Properties

Austinite

Brookite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Easily soluble in cold dilute HCl

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.123.87-4.14

1 7.18

1.5 Fracture

Brittle, Uneven, Brittle, Uneven

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

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

Poor on {120}, in traces on {001}

1.7 Mohs Hardness

4-4.55.5-6

2 10

1.8 Chemical Composition

CaZn(AsO4)(OH)

TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Austinite and Brookite Chemical Formula

While comparing Austinite and Brookite 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 Austinite and Brookite chemical formula.

Chemical formula of Austinite- CaZn(AsO4)(OH)
Chemical formula of Brookite- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Austinite and Brookite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Austinite and Brookite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Austinite and Brookite Optical Properties during the identification of gemstone. Specific gravity of Austinite is 3.87-4.14 whereas that of Brookite is 3.87-4.14.