Achroite and Taaffeite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.90-3.40
3.60-3.61
Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Conchoidal
Cleavage
Not Available
Imperfect/fair/absent
Mohs Hardness
7-7.5
8-8.5
Chemical Composition
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.
Mg 3Al 8BeO 16Walter Schumann , Gemstones of the world (2001) More from other references
Achroite and Taaffeite Chemical Formula
While comparing Achroite and Taaffeite 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 Achroite and Taaffeite chemical formula.
- 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.
- Chemical formula of Taaffeite- Mg 3Al 8BeO 16Walter Schumann , Gemstones of the world (2001) More from other references
Achroite and Taaffeite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Achroite and Taaffeite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Taaffeite Optical Properties during the identification of gemstone. Specific gravity of Achroite is 3.60-3.61 whereas that of Taaffeite is 3.60-3.61.