Sellaite and Pyrophyllite Physical Properties

Sellaite

Pyrophyllite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.14-3.162.65-2.90

1 7.18

1.5 Fracture

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle

Gemstones (2009), Flexible Flexible fragments.

1.6 Cleavage

Perfect on {010} and {110}

{001} Perfect

1.7 Mohs Hardness

5-5.5Not Available

2 10

1.8 Chemical Composition

MgF 2Ulrich Henn and Claudio C.

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

Sellaite and Pyrophyllite Chemical Formula

While comparing Sellaite and Pyrophyllite 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 Sellaite and Pyrophyllite chemical formula.

Chemical formula of Sellaite- MgF 2Ulrich Henn and Claudio C.
Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Sellaite and Pyrophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sellaite and Pyrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sellaite and Pyrophyllite Optical Properties during the identification of gemstone. Specific gravity of Sellaite is 2.65-2.90 whereas that of Pyrophyllite is 2.65-2.90.