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Achroite and Pollucite Physical Properties


Pollucite and Achroite Physical Properties


Physical Properties

Tenacity
Not Available   
Brittle   

Solubility
Not Available   
Readily soluble in HF   

Durability
Not Available   
Not Available   

Specific Gravity
2.90-3.40   
2.86-2.94   

Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)   
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle   

Cleavage
Not Available   
None observed   

Mohs Hardness
7-7.5   
6.5-7   

Chemical Composition
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.   
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references   

Optical Properties >>
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Achroite and Pollucite Chemical Formula

While comparing Achroite and Pollucite 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 Achroite and Pollucite chemical formula.

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Achroite and Pollucite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Achroite and Pollucite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Pollucite Optical Properties during the identification of gemstone. Specific gravity of Achroite is 2.86-2.94 whereas that of Pollucite is 2.86-2.94.

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