Pyrophyllite and Nepheline Physical Properties

Pyrophyllite

Nepheline

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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

2.65-2.902.55-2.65

1 7.18

1.5 Fracture

Gemstones (2009), Flexible Flexible fragments.

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

{001} Perfect

[1010] Poor

1.7 Mohs Hardness

Not Available5-6

2 10

1.8 Chemical Composition

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

Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.

Pyrophyllite and Nepheline Chemical Formula

While comparing Pyrophyllite and Nepheline 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 Nepheline chemical formula.

Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.

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Pyrophyllite and Nepheline Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrophyllite and Nepheline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrophyllite and Nepheline Optical Properties during the identification of gemstone. Specific gravity of Pyrophyllite is 2.55-2.65 whereas that of Nepheline is 2.55-2.65.