Tantalite and Achroite Physical Properties

Tantalite

Achroite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

5.22.90-3.40

1 7.18

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Fracture

Subconchoidal, Conchoidal

Uneven, ConchoidalWalter Schumann

Cleavage

Good in one direction

Indiscernible

Mohs Hardness

6-6.57-7.5

2 10

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Chemical Composition

(Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references

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.

Tantalite and Achroite Chemical Formula

While comparing Tantalite and Achroite 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 Tantalite and Achroite chemical formula.

Chemical formula of Tantalite- (Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references
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.

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Tantalite and Achroite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Tantalite and Achroite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tantalite and Achroite Optical Properties during the identification of gemstone. Specific gravity of Tantalite is 2.90-3.40 whereas that of Achroite is 2.90-3.40.