Apatite and Austinite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Easily soluble in cold dilute HCl
Durability
Not Available
Not Available
Specific Gravity
3.16-3.23
4.12
Fracture
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal to uneven
Brittle, Uneven, Brittle, Uneven
Cleavage
[0001] indistinct, [1010] indistinct
Good in two directions parallel to the prism faces {110}
Chemical Composition
Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
CaZn(AsO4)(OH)
Apatite and Austinite Chemical Formula
While comparing Apatite and Austinite 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 Apatite and Austinite chemical formula.
- Chemical formula of Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
- Chemical formula of Austinite- CaZn(AsO4)(OH)
Apatite and Austinite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Apatite and Austinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Austinite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 4.12 whereas that of Austinite is 4.12.