Cinnabar and Atacamite Physical Properties
Tenacity
Slightly sectile
Brittle
Solubility
1.04 x 10−25 g per 100 ml water (Ksp at 25°C = 2 x 10−32)
Not Available
Durability
Not Available
Not Available
Specific Gravity
2
3.745-3.776
Fracture
Uneven, Uneven, Gemstones (2009), Brittle
Conchoidal, Conchoidal, Brittle
Cleavage
Prismatic {10 1 0}, perfect
Perfect on {010}, fair on {101}
Mohs Hardness
2-2.5
3-3.5
Chemical Composition
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Cu2Cl(OH)3
Cinnabar and Atacamite Chemical Formula
While comparing Cinnabar and Atacamite 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 Cinnabar and Atacamite chemical formula.
- Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Atacamite- Cu2Cl(OH)3
Cinnabar and Atacamite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Cinnabar and Atacamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cinnabar and Atacamite Optical Properties during the identification of gemstone. Specific gravity of Cinnabar is 3.745-3.776 whereas that of Atacamite is 3.745-3.776.