Afghanite and Phenakite Physical Properties

Afghanite

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

2.55-2.65

2.90-2.98

1.5 Fracture

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

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

1.6 Cleavage

Perfect {10 1 0}

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

1.7 Mohs Hardness

5.5-6

7.5-8

1.8 Chemical Composition

(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)

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

Afghanite and Phenakite Chemical Formula

While comparing Afghanite 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 Afghanite and Phenakite chemical formula.

Chemical formula of Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
Chemical formula of Phenakite- Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Afghanite and Phenakite Specific Gravity

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