Pyromorphite and Cinnabar Physical Properties
Tenacity
Brittle
Slightly sectile
Solubility
Not Available
1.04 x 10−25 g per 100 ml water (Ksp at 25°C = 2 x 10−32)
Durability
Not Available
Not Available
Specific Gravity
6.5-7.1
2
Fracture
Uneven, ConchoidalArthur Thomas, Brittle, Metallic
Uneven, Uneven, Gemstones (2009), Brittle
Cleavage
Imperfect- [10 1 1]
Prismatic {10 1 0}, perfect
Mohs Hardness
3.5-4
2-2.5
Chemical Composition
Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Pyromorphite and Cinnabar Chemical Formula
While comparing Pyromorphite 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 Pyromorphite and Cinnabar chemical formula.
- Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
- Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Pyromorphite and Cinnabar Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pyromorphite and Cinnabar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyromorphite and Cinnabar Optical Properties during the identification of gemstone. Specific gravity of Pyromorphite is 2 whereas that of Cinnabar is 2.