Crocoite and Austinite Physical Properties

Crocoite

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

5.90-6.104.12

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), (e.g. graphite).

Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

{110} Distinct, {001} Indistinct, {100} Indistinct

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

1.7 Mohs Hardness

2.5-34-4.5

2 10

1.8 Chemical Composition

PbCrO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

CaZn(AsO4)(OH)

Crocoite and Austinite Chemical Formula

While comparing Crocoite 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 Crocoite and Austinite chemical formula.

Chemical formula of Crocoite- PbCrO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Austinite- CaZn(AsO4)(OH)

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Crocoite and Austinite Specific Gravity

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