Apophyllite KF and Fayalite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.33-2.37
4.392
Fracture
Uneven, Brittle, Uneven, Brittle, Uneven
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Cleavage
Perfect on {001}, imperfect on {110}
{010} moderate, {100} imperfect
Mohs Hardness
4.5-5
6.5-7
Chemical Composition
(K,Na)Ca4Si8O20(F,OH)•8(H2O)
Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Apophyllite KF and Fayalite Chemical Formula
While comparing Apophyllite KF and Fayalite 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 Apophyllite KF and Fayalite chemical formula.
- Chemical formula of Apophyllite KF- (K,Na)Ca4Si8O20(F,OH)•8(H2O)
- Chemical formula of Fayalite- Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Apophyllite KF and Fayalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Apophyllite KF and Fayalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apophyllite KF and Fayalite Optical Properties during the identification of gemstone. Specific gravity of Apophyllite KF is 4.392 whereas that of Fayalite is 4.392.