Sillimanite and Anthophyllite Physical Properties

Sillimanite

Anthophyllite

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1 Physical Properties

1.1 Tenacity

Tough

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.262.9-3.5

1 7.18

1.5 Fracture

Splintery

Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, Brittle

1.6 Cleavage

{010} perfect

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

1.7 Mohs Hardness

6-7.55.5-6

2 10

1.8 Chemical Composition

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

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

Sillimanite and Anthophyllite Chemical Formula

While comparing Sillimanite 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 Sillimanite and Anthophyllite chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Anthophyllite- (Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

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Sillimanite and Anthophyllite Specific Gravity

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