Anthophyllite and Polyhalite Physical Properties

Anthophyllite

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

2.9-3.52.78

1 7.18

1.5 Fracture

Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, Brittle

Conchoidal, Brittle

1.6 Cleavage

{110} Perfect, {???} Distinct, {???} Distinct

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

1.7 Mohs Hardness

5.5-63.5

2 10

1.8 Chemical Composition

(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

Not Available

Anthophyllite and Polyhalite Chemical Formula

While comparing Anthophyllite 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 Anthophyllite and Polyhalite chemical formula.

Chemical formula of Anthophyllite- (Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

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Anthophyllite and Polyhalite Specific Gravity

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