Simpsonite and Sillimanite Physical Properties

Simpsonite

Sillimanite

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1 Physical Properties

1.1 Tenacity

Not Available

Tough

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

Not Available

3.20-3.26

1.5 Fracture

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

Splintery

1.6 Cleavage

None

{010} perfect

1.7 Mohs Hardness

7-7.5

6-7.5

1.8 Chemical Composition

Al 4(Ta,Nb) 3(O,OH,F) 14Ulrich Henn and Claudio C.

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

Simpsonite and Sillimanite Chemical Formula

While comparing Simpsonite and Sillimanite 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 Simpsonite and Sillimanite chemical formula.

Chemical formula of Simpsonite- Al 4(Ta,Nb) 3(O,OH,F) 14Ulrich Henn and Claudio C.
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

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Simpsonite and Sillimanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Simpsonite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Simpsonite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Simpsonite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.