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Ettringite
Ettringite

Mottramite
Mottramite



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Ettringite
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Mottramite

Ettringite and Mottramite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
Partially soluble in water
-
1.77
-
Perfect on {10 1 0}
2-2.5
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)
 
Brittle
Soluble
-
5.9
Sub-Conchoidal
None observed
3
PbCu(VO4)(OH)

Ettringite and Mottramite Chemical Formula

While comparing Ettringite and Mottramite 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 Mottramite chemical formula.

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Ettringite and Mottramite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Mottramite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite Vs Mottramite during the identification of gemstone. Specific gravity of Ettringite is whereas that of Mottramite is .