Petalite and Cryolite Physical Properties

Petalite

Cryolite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

insoluble

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.402.97

1 7.18

1.5 Fracture

Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal

Uneven

1.6 Cleavage

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

None observed

1.7 Mohs Hardness

6-6.52.5

2 10

1.8 Chemical Composition

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

Na 3AlF 6Ulrich Henn and Claudio C.

Petalite and Cryolite Chemical Formula

While comparing Petalite and Cryolite 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 Cryolite chemical formula.

Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Cryolite- Na 3AlF 6Ulrich Henn and Claudio C.

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Petalite and Cryolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Petalite and Cryolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite and Cryolite Optical Properties during the identification of gemstone. Specific gravity of Petalite is 2.97 whereas that of Cryolite is 2.97.