Montebrasite and Austinite Physical Properties

Montebrasite

Austinite

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Physical Properties

Tenacity

Brittle

Solubility

Easily soluble in cold dilute HCl

Durability

Specific Gravity

2.98-3.104.12

1 7.18

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Fracture

Uneven, Conchoidal

Uneven

Cleavage

{100} Perfect, {110} Good, {011} Distinct

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

Mohs Hardness

5.5-64-4.5

2 10

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Chemical Composition

LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references

CaZn(AsO4)(OH)

Montebrasite and Austinite Chemical Formula

While comparing Montebrasite 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 Montebrasite and Austinite chemical formula.

Chemical formula of Montebrasite- LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Austinite- CaZn(AsO4)(OH)

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Montebrasite and Austinite Specific Gravity

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