Liddicoatite and Polyhalite Physical Properties

Liddicoatite

Polyhalite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.022.78

1 7.18

1.5 Fracture

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

Conchoidal, Brittle

1.6 Cleavage

{0001} Poor

Perfect on {10 1 }; parting on {010}

1.7 Mohs Hardness

Not Available3.5

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)

Not Available

Liddicoatite and Polyhalite Chemical Formula

While comparing Liddicoatite and Polyhalite 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 Polyhalite 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)

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Liddicoatite and Polyhalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Liddicoatite and Polyhalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Liddicoatite and Polyhalite Optical Properties during the identification of gemstone. Specific gravity of Liddicoatite is 2.78 whereas that of Polyhalite is 2.78.