Nepheline and Phenakite Physical Properties

Nepheline

Phenakite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.652.90-2.98

1 7.18

1.5 Fracture

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

Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001), Brittle

1.6 Cleavage

[1010] Poor

Distinct on {11 2 0}, imperfect on {10 1 1}

1.7 Mohs Hardness

5-67.5-8

2 10

1.8 Chemical Composition

Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.

Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Nepheline and Phenakite Chemical Formula

While comparing Nepheline and Phenakite 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 Nepheline and Phenakite chemical formula.

Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
Chemical formula of Phenakite- Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Nepheline and Phenakite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Nepheline and Phenakite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Nepheline and Phenakite Optical Properties during the identification of gemstone. Specific gravity of Nepheline is 2.90-2.98 whereas that of Phenakite is 2.90-2.98.