Sillimanite and Childrenite Physical Properties
Tenacity
Tough
Not Available
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
3.20-3.26
3.06-3.25
Fracture
Splintery
Sub-Conchoidal, ConchoidalArthur Thomas, Conchoidal, Uneven
Cleavage
{010} perfect
Poor/indistinct on {100}
Mohs Hardness
6-7.5
4.5-5
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
(Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)
Sillimanite and Childrenite Chemical Formula
While comparing Sillimanite and Childrenite 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 Childrenite chemical formula.
- Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Childrenite- (Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)
Sillimanite and Childrenite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sillimanite and Childrenite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Childrenite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 3.06-3.25 whereas that of Childrenite is 3.06-3.25.