Liddicoatite and Petalite Physical Properties

Liddicoatite

Petalite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.022.40

1 7.18

1.5 Fracture

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

Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal

1.6 Cleavage

{0001} Poor

Perfect on {001}, poor on {201} with 38.5° angle between the two

1.7 Mohs Hardness

Not Available6-6.5

2 10

1.8 Chemical Composition

Ca(Li 2Al)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Liddicoatite and Petalite Chemical Formula

While comparing Liddicoatite and Petalite 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 Liddicoatite and Petalite chemical formula.

Chemical formula of Liddicoatite- Ca(Li 2Al)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Chemical formula of Petalite- LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Green Gemstones

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Liddicoatite Vs Moldavite

Liddicoatite and Petalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Liddicoatite and Petalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Liddicoatite and Petalite Optical Properties during the identification of gemstone. Specific gravity of Liddicoatite is 2.40 whereas that of Petalite is 2.40.