Hibonite and Polyhalite Physical Properties

Hibonite

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

3.842.78

1 7.18

1.5 Fracture

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

Conchoidal, Brittle

1.6 Cleavage

{0001} good, {10 1 0} parting

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

1.7 Mohs Hardness

7.5-83.5

2 10

1.8 Chemical Composition

(Ca,Ce)(Al,Ti,Mg)12O19

Not Available

Hibonite and Polyhalite Chemical Formula

While comparing Hibonite 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 Hibonite and Polyhalite chemical formula.

Chemical formula of Hibonite- (Ca,Ce)(Al,Ti,Mg)12O19

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Hibonite and Polyhalite Specific Gravity

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