Pyrophyllite and Halite Physical Properties

Pyrophyllite

Halite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Water-soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.65-2.902.17

1 7.18

1.5 Fracture

Gemstones (2009), Flexible Flexible fragments.

Conchoidal, Brittle, Metallic

1.6 Cleavage

{001} Perfect

Perfect {001}, three directions cubic

1.7 Mohs Hardness

Not Available2.0-2.5

2 10

1.8 Chemical Composition

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

NaCl

Pyrophyllite and Halite Chemical Formula

While comparing Pyrophyllite and Halite 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 Halite chemical formula.

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

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Pyrophyllite and Halite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrophyllite and Halite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrophyllite and Halite Optical Properties during the identification of gemstone. Specific gravity of Pyrophyllite is 2.17 whereas that of Halite is 2.17.