Scapolite and Sillimanite Physical Properties

Scapolite

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

2.58-2.743.20-3.26

1 7.18

1.5 Fracture

ConchoidalWalter Schumann, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Splintery

Splintery

1.6 Cleavage

{100} Distinct, {110} Distinct

{010} perfect

1.7 Mohs Hardness

5.5-66-7.5

2 10

1.8 Chemical Composition

Na 4Al 3Si 9O 24Cl to Ca 4Al 6Si 6O 24(CO 3,SO 4)Walter Schumann , Gemstones of the world (2001) More from other references

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

Scapolite and Sillimanite Chemical Formula

While comparing Scapolite 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 Scapolite and Sillimanite chemical formula.

Chemical formula of Scapolite- Na 4Al 3Si 9O 24Cl to Ca 4Al 6Si 6O 24(CO 3,SO 4)Walter Schumann , Gemstones of the world (2001) More from other references
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

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Scapolite and Sillimanite Specific Gravity

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