Achroite and Ulexite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.90-3.40
1.65-1.99
Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
UnevenAnthony et al, Uneven, UnevenAnthony et al, Uneven, Brittle, Metallic
Cleavage
Not Available
{010} Perfect, {110} Perfect
Mohs Hardness
7-7.5
2-2.5
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.
NaCaB 5O 6(OH) 6 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Achroite and Ulexite Chemical Formula
While comparing Achroite and Ulexite 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 Ulexite 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 Ulexite- NaCaB 5O 6(OH) 6 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Achroite and Ulexite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Achroite and Ulexite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Ulexite Optical Properties during the identification of gemstone. Specific gravity of Achroite is 1.65-1.99 whereas that of Ulexite is 1.65-1.99.