Ettringite and Cinnabar Physical Properties
Tenacity
Not Available
Slightly sectile
Solubility
Partially soluble in water
1.04 x 10−25 g per 100 ml water (Ksp at 25°C = 2 x 10−32)
Durability
Not Available
Not Available
Fracture
Not Available
Uneven, Uneven, Gemstones (2009), Brittle
Cleavage
Perfect on {10 1 0}
Prismatic {10 1 0}, perfect
Mohs Hardness
2-2.5
2-2.5
Chemical Composition
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ettringite and Cinnabar Chemical Formula
While comparing Ettringite and Cinnabar 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 Ettringite and Cinnabar chemical formula.
- Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ettringite and Cinnabar Specific Gravity
Another important criteria for qualitative analysis of gemstones is Ettringite and Cinnabar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Cinnabar Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 2 whereas that of Cinnabar is 2.