Alunite and Anthophyllite Physical Properties

Alunite

Anthophyllite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.92.9-3.5

1 7.18

1.5 Fracture

Conchoidal, Uneven

Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, Brittle

1.6 Cleavage

On {0001}, perfect

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

1.7 Mohs Hardness

3.5-45.5-6

2 10

1.8 Chemical Composition

KAl3(SO4)2(OH)6

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

Alunite and Anthophyllite Chemical Formula

While comparing Alunite and Anthophyllite 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 Alunite and Anthophyllite chemical formula.

Chemical formula of Alunite- KAl3(SO4)2(OH)6
Chemical formula of Anthophyllite- (Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

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Alunite and Anthophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Alunite and Anthophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Anthophyllite Optical Properties during the identification of gemstone. Specific gravity of Alunite is 2.9-3.5 whereas that of Anthophyllite is 2.9-3.5.