Pollucite and Sylvite Physical Properties

Pollucite

Sylvite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Readily soluble in HF

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.86-2.941.993

1 7.18

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle

Uneven, Brittle

1.6 Cleavage

None observed

Perfect on [100], [010], [001]

1.7 Mohs Hardness

6.5-72.5

2 10

1.8 Chemical Composition

(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

Not Available

Pollucite and Sylvite Chemical Formula

While comparing Pollucite 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 Pollucite and Sylvite chemical formula.

Chemical formula of Pollucite- (Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

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Pollucite and Sylvite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pollucite and Sylvite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pollucite and Sylvite Optical Properties during the identification of gemstone. Specific gravity of Pollucite is 1.993 whereas that of Sylvite is 1.993.