Petalite and Wavellite Physical Properties

Petalite

Wavellite

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Physical Properties

Tenacity

Brittle

Solubility

insoluble

Durability

Specific Gravity

2.402.36

1 7.18

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Fracture

Subconchoidal, ConchoidalWalter Schumann, Conchoidal

Uneven, Subconchoidal, Fibrous

Cleavage

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

[110] perfect, [101] good, [010] distinct

Mohs Hardness

6-6.53.5-4

2 10

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Chemical Composition

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

Al 3(PO 4) 2(OH,F) 3 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Petalite and Wavellite Chemical Formula

While comparing Petalite and Wavellite 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 Wavellite chemical formula.

Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Wavellite- Al 3(PO 4) 2(OH,F) 3 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Petalite and Wavellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Petalite and Wavellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite and Wavellite Optical Properties during the identification of gemstone. Specific gravity of Petalite is 2.36 whereas that of Wavellite is 2.36.