Elbaite and Legrandite Physical Properties

Elbaite

Legrandite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-3.103.98-4.04

1 7.18

1.5 Fracture

Uneven, Conchoidal, Brittle, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

Poor/indistinct on {1120} and {1011}

Imperfect, poor one {100}

1.7 Mohs Hardness

74.5-5

2 10

1.8 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

Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Elbaite and Legrandite Chemical Formula

While comparing Elbaite and Legrandite 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 Legrandite 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 Legrandite- Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Elbaite and Legrandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Elbaite and Legrandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Elbaite and Legrandite Optical Properties during the identification of gemstone. Specific gravity of Elbaite is 3.98-4.04 whereas that of Legrandite is 3.98-4.04.