Petalite and Apophyllite KF Physical Properties

Petalite

Apophyllite KF

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

Brittle

insoluble

2.40

Subconchoidal, ConchoidalWalter Schumann, Conchoidal

Perfect on {001}, poor on {201} with 38.5° angle between the two

6-6.5

LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Brittle

2.33-2.37

Uneven

Perfect on {001}, imperfect on {110}

4.5-5

(K,Na)Ca4Si8O20(F,OH)•8(H2O)

Petalite and Apophyllite KF Chemical Formula

While comparing Petalite 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 Petalite and Apophyllite KF chemical formula.

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Petalite and Apophyllite KF Specific Gravity

Another important criteria for qualitative analysis of gemstones is Petalite and Apophyllite KF Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite Vs Apophyllite KF during the identification of gemstone. Specific gravity of Petalite is whereas that of Apophyllite KF is .