Pyrophyllite and Apophyllite KF Physical Properties

Pyrophyllite

Apophyllite KF

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.65-2.902.33-2.37

1 7.18

1.5 Fracture

Gemstones (2009), Flexible Flexible fragments.

Uneven, Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

{001} Perfect

Perfect on {001}, imperfect on {110}

1.7 Mohs Hardness

Not Available4.5-5

2 10

1.8 Chemical Composition

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

(K,Na)Ca4Si8O20(F,OH)•8(H2O)

Pyrophyllite and Apophyllite KF Chemical Formula

While comparing Pyrophyllite and Apophyllite KF 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 Apophyllite KF chemical formula.

Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Apophyllite KF- (K,Na)Ca4Si8O20(F,OH)•8(H2O)

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Pyrophyllite and Apophyllite KF Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrophyllite and Apophyllite KF Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrophyllite and Apophyllite KF Optical Properties during the identification of gemstone. Specific gravity of Pyrophyllite is 2.33-2.37 whereas that of Apophyllite KF is 2.33-2.37.