Pyrophyllite and Purpurite Physical Properties

Pyrophyllite

Purpurite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.65-2.903.2-3.4

1 7.18

1.5 Fracture

Gemstones (2009), Flexible Flexible fragments.

Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

{001} Perfect

[100] [001] perfect

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

MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

Pyrophyllite and Purpurite Chemical Formula

While comparing Pyrophyllite and Purpurite 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 Purpurite chemical formula.

Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

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Pyrophyllite and Purpurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrophyllite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrophyllite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Pyrophyllite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.