Foitite and Pyrophyllite Physical Properties

Foitite

Pyrophyllite

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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

3.172.65-2.90

1 7.18

1.5 Fracture

Handbook of mineralogy (2001)

Gemstones (2009), Flexible Flexible fragments.

1.6 Cleavage

None

{001} Perfect

1.7 Mohs Hardness

7Not Available

2 10

1.8 Chemical Composition

Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)

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

Foitite and Pyrophyllite Chemical Formula

While comparing Foitite 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 Foitite and Pyrophyllite chemical formula.

Chemical formula of Foitite- Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Violet Gemstones

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Foitite and Pyrophyllite Specific Gravity

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