Austinite and Achroite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Easily soluble in cold dilute HCl
Not Available
Durability
Not Available
Not Available
Specific Gravity
4.12
2.90-3.40
Fracture
Brittle, Uneven, Brittle, Uneven
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Cleavage
Good in two directions parallel to the prism faces {110}
Not Available
Mohs Hardness
4-4.5
7-7.5
Chemical Composition
CaZn(AsO4)(OH)
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Austinite and Achroite Chemical Formula
While comparing Austinite and Achroite 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 Austinite and Achroite chemical formula.
- Chemical formula of Austinite- CaZn(AsO4)(OH)
- Chemical formula of Achroite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Austinite and Achroite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Austinite and Achroite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Austinite and Achroite Optical Properties during the identification of gemstone. Specific gravity of Austinite is 2.90-3.40 whereas that of Achroite is 2.90-3.40.