Elbaite and Sillimanite Physical Properties
Tenacity
Not Available
Tough
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.90-3.10
3.20-3.26
Fracture
Uneven, Conchoidal, Brittle, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Splintery
Cleavage
Poor/indistinct on {1120} and {1011}
{010} perfect
Chemical Composition
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Elbaite and Sillimanite Chemical Formula
While comparing Elbaite 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 Elbaite and Sillimanite chemical formula.
- Chemical formula of Elbaite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references
- Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Elbaite and Sillimanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Elbaite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Elbaite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Elbaite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.