Foitite and Pyrophyllite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.17
2.65-2.90
Fracture
Handbook of mineralogy (2001)
Gemstones (2009), Flexible Flexible fragments.
Cleavage
None
{001} Perfect
Mohs Hardness
7
Not Available
Chemical Composition
Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Foitite and Pyrophyllite Chemical Formula
While comparing Foitite and Pyrophyllite 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 Foitite and Pyrophyllite chemical formula.
- Chemical formula of Foitite- Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)
- Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Foitite and Pyrophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Foitite and Pyrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Foitite and Pyrophyllite Optical Properties during the identification of gemstone. Specific gravity of Foitite is 2.65-2.90 whereas that of Pyrophyllite is 2.65-2.90.