Alunite and Hemimorphite Physical Properties
Solubility
Soluble
Soluble
Durability
Not Available
Not Available
Specific Gravity
2.6-2.9
3.30-3.50
Fracture
Conchoidal, Uneven
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle
Cleavage
On {0001}, perfect
Perfect on {110}, poor on {101}, {001} rare
Chemical Composition
KAl3(SO4)2(OH)6
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Alunite and Hemimorphite Chemical Formula
While comparing Alunite and Hemimorphite 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 Alunite and Hemimorphite chemical formula.
- Chemical formula of Alunite- KAl3(SO4)2(OH)6
- Chemical formula of Hemimorphite- Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Alunite and Hemimorphite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Alunite and Hemimorphite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Alunite and Hemimorphite Optical Properties during the identification of gemstone. Specific gravity of Alunite is 3.30-3.50 whereas that of Hemimorphite is 3.30-3.50.