Achroite and Bastnasite Physical Properties

Achroite

Bastnasite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

2.90-3.404.95-5.0

1 7.18

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Fracture

Uneven, ConchoidalWalter Schumann

Uneven

Cleavage

Indiscernible

Imperfect to indistinct on {10 1 0}, parting on {0001}

Mohs Hardness

7-7.54-5

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.

(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Achroite and Bastnasite Chemical Formula

While comparing Achroite and Bastnasite 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 Bastnasite 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 Bastnasite- (Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Achroite and Bastnasite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Achroite and Bastnasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Bastnasite Optical Properties during the identification of gemstone. Specific gravity of Achroite is 4.95-5.0 whereas that of Bastnasite is 4.95-5.0.