Petalite and Sylvite Physical Properties
Solubility
insoluble
Soluble
Durability
Not Available
Not Available
Specific Gravity
2.40
1.993
Fracture
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
Uneven, Brittle
Cleavage
Perfect on {001}, poor on {201} with 38.5° angle between the two
Perfect on [100], [010], [001]
Chemical Composition
LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Not Available
Petalite and Sylvite Chemical Formula
While comparing Petalite and Sylvite 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 Sylvite chemical formula.
- Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
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Petalite and Sylvite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Petalite and Sylvite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Petalite and Sylvite Optical Properties during the identification of gemstone. Specific gravity of Petalite is 1.993 whereas that of Sylvite is 1.993.