Pyrophyllite and Austinite Physical Properties

Pyrophyllite

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

2.65-2.904.12

1 7.18

1.5 Fracture

Gemstones (2009), Flexible Flexible fragments.

Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

{001} 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

Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

CaZn(AsO4)(OH)

Pyrophyllite and Austinite Chemical Formula

While comparing Pyrophyllite 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 Pyrophyllite and Austinite chemical formula.

Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Austinite- CaZn(AsO4)(OH)

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Pyrophyllite and Austinite Specific Gravity

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