Cryolite and Petalite Physical Properties

Cryolite

Petalite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.972.40

1 7.18

1.5 Fracture

Uneven

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

1.6 Cleavage

None observed

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

1.7 Mohs Hardness

2.56-6.5

2 10

1.8 Chemical Composition

Na 3AlF 6Ulrich Henn and Claudio C.

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

Cryolite and Petalite Chemical Formula

While comparing Cryolite and Petalite 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 Cryolite and Petalite chemical formula.

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

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Cryolite and Petalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cryolite and Petalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cryolite and Petalite Optical Properties during the identification of gemstone. Specific gravity of Cryolite is 2.40 whereas that of Petalite is 2.40.