Purpurite and Ettringite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Partially soluble in water
Durability
Not Available
Not Available
Specific Gravity
3.2-3.4
1.77
Fracture
Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle
Not Available
Cleavage
[100] [001] perfect
Perfect on {10 1 0}
Mohs Hardness
4-4.5
2-2.5
Chemical Composition
MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Purpurite and Ettringite Chemical Formula
While comparing Purpurite and Ettringite 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 Purpurite and Ettringite chemical formula.
- Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
- Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Purpurite and Ettringite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Purpurite and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Purpurite and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Purpurite is 1.77 whereas that of Ettringite is 1.77.