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Ettringite and Nepheline Physical Properties


Nepheline and Ettringite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Partially soluble in water   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
1.77   
2.55-2.65   

Fracture
Not Available   
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle   

Cleavage
Perfect on {10 1 0}   
[1010] Poor   

Mohs Hardness
2-2.5   
5-6   

Chemical Composition
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)   
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.   

Optical Properties >>
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Ettringite and Nepheline Chemical Formula

While comparing Ettringite and Nepheline 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 Ettringite and Nepheline chemical formula.

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Ettringite and Nepheline Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Nepheline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Nepheline Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 2.55-2.65 whereas that of Nepheline is 2.55-2.65.

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