Pyromorphite and Achroite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
6.5-7.1
2.90-3.40
Fracture
Uneven, ConchoidalArthur Thomas, Brittle, Metallic
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Cleavage
Imperfect- [10 1 1]
Not Available
Mohs Hardness
3.5-4
7-7.5
Chemical Composition
Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
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.
Pyromorphite and Achroite Chemical Formula
While comparing Pyromorphite and Achroite 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 Achroite chemical formula.
- Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
- 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.
Pyromorphite and Achroite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pyromorphite and Achroite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyromorphite and Achroite Optical Properties during the identification of gemstone. Specific gravity of Pyromorphite is 2.90-3.40 whereas that of Achroite is 2.90-3.40.