Microlite and Polyhalite Physical Properties

Microlite

Polyhalite

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Physical Properties

Tenacity

Brittle

Solubility

Soluble

Durability

Specific Gravity

5.52.78

1 7.18

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Fracture

Conchoidal

Cleavage

{111} Indistinct, {111} Indistinct, {111} Indistinct

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

Mohs Hardness

5-5.53.5

2 10

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Chemical Composition

(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

K2Ca2Mg(SO4)4·2H2O

Microlite and Polyhalite Chemical Formula

While comparing Microlite 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 Microlite and Polyhalite chemical formula.

Chemical formula of Microlite- (Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O

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Microlite and Polyhalite Specific Gravity

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