Bastnasite and Austinite Physical Properties

Bastnasite

Austinite

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Physical Properties

Tenacity

Brittle

Solubility

Easily soluble in cold dilute HCl

Durability

Specific Gravity

4.95-5.04.12

1 7.18

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Fracture

Uneven

Cleavage

Imperfect to indistinct on {10 1 0}, parting on {0001}

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

Mohs Hardness

4-54-4.5

2 10

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Chemical Composition

(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

CaZn(AsO4)(OH)

Bastnasite and Austinite Chemical Formula

While comparing Bastnasite 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 Bastnasite and Austinite chemical formula.

Chemical formula of Bastnasite- (Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Austinite- CaZn(AsO4)(OH)

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Bastnasite and Austinite Specific Gravity

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