Pollucite and Riebeckite Physical Properties
Solubility
Readily soluble in HF
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.86-2.94
3.28-3.44
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Uneven, Splintery, Brittle
Cleavage
None observed
Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}
Mohs Hardness
6.5-7
5.0-6.0
Chemical Composition
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
Not Available
Pollucite and Riebeckite Chemical Formula
While comparing Pollucite and Riebeckite 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 Riebeckite 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 Riebeckite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pollucite and Riebeckite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pollucite and Riebeckite Optical Properties during the identification of gemstone. Specific gravity of Pollucite is 3.28-3.44 whereas that of Riebeckite is 3.28-3.44.