Afghanite and Sodalite Physical Properties

Afghanite

Sodalite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.65

2.15-2.40

1.5 Fracture

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

Conchoidal, Uneven, UnevenArthur Thomas, Brittle

1.6 Cleavage

Perfect {10 1 0}

Poor on {110}

1.7 Mohs Hardness

5.5-6

5-6

1.8 Chemical Composition

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

Na₈Al₆Si₆O₂₄Cl₂

Afghanite and Sodalite Chemical Formula

While comparing Afghanite and Sodalite 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 Sodalite 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 Sodalite- Na₈Al₆Si₆O₂₄Cl₂

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Afghanite and Sodalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Afghanite and Sodalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Afghanite and Sodalite Optical Properties during the identification of gemstone. Specific gravity of Afghanite is 2.15-2.40 whereas that of Sodalite is 2.15-2.40.