Achroite and Aegirine Physical Properties

Achroite

Aegirine

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

2.90-3.403.50-3.60

1 7.18

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Fracture

Uneven, ConchoidalWalter Schumann

Uneven

Cleavage

Indiscernible

Good on {110}, (110) ^ (1 1 0) ≈87°; parting on {100}

Mohs Hardness

7-7.56

2 10

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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.

(Na,Fe,Ca)Si 2O 6Ulrich Henn and Claudio C.

Achroite and Aegirine Chemical Formula

While comparing Achroite and Aegirine 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 Aegirine chemical formula.

Chemical formula of Achroite- 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.
Chemical formula of Aegirine- (Na,Fe,Ca)Si 2O 6Ulrich Henn and Claudio C.

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Achroite and Aegirine Specific Gravity

Another important criteria for qualitative analysis of gemstones is Achroite and Aegirine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Aegirine Optical Properties during the identification of gemstone. Specific gravity of Achroite is 3.50-3.60 whereas that of Aegirine is 3.50-3.60.