Elbaite and Astrophyllite Physical Properties

Elbaite

Astrophyllite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

2.90-3.103.2-3.4

1 7.18

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Fracture

Uneven, Conchoidal

Uneven

Cleavage

Poor/indistinct on {1120} and {1011}

Perfect on [001] imperfect on [100]

Mohs Hardness

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) More from other references

(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

Elbaite and Astrophyllite Chemical Formula

While comparing Elbaite and Astrophyllite 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 Elbaite and Astrophyllite chemical formula.

Chemical formula of Elbaite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references
Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

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Elbaite and Astrophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Elbaite and Astrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Elbaite and Astrophyllite Optical Properties during the identification of gemstone. Specific gravity of Elbaite is 3.2-3.4 whereas that of Astrophyllite is 3.2-3.4.