Sillimanite and Langbeinite Physical Properties

Sillimanite

Langbeinite

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1 Physical Properties

1.1 Tenacity

Tough

Brittle

1.2 Solubility

Not Available

Slowly dissolves in water

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.26Not Available

1 7.18

1.5 Fracture

Splintery

Conchoidal, Brittle

1.6 Cleavage

{010} perfect

None

1.7 Mohs Hardness

6-7.53.5-4

2 10

1.8 Chemical Composition

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

Not Available

Sillimanite and Langbeinite Chemical Formula

While comparing Sillimanite and Langbeinite 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 Langbeinite chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

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Sillimanite and Langbeinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Langbeinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Langbeinite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is Not Available whereas that of Langbeinite is Not Available.