Ettringite and Calcite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Partially soluble in water
Soluble
Durability
Not Available
Not Available
Specific Gravity
1.77
2.67-2.73
Fracture
Not Available
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Cleavage
Perfect on {10 1 0}
Perfect on [10 1 1] three directions with angle of 74° 55
Chemical Composition
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
CaCO 3Ulrich Henn and Claudio C.
Ettringite and Calcite Chemical Formula
While comparing Ettringite and Calcite 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 Calcite chemical formula.
- Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.
Ettringite and Calcite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Ettringite and Calcite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Calcite Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 2.67-2.73 whereas that of Calcite is 2.67-2.73.