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Ettringite
Ettringite

Sylvite
Sylvite



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Ettringite
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Sylvite

Ettringite and Sylvite 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
-
1.993
Uneven
Perfect on [100], [010], [001]
2.5
KCl

Ettringite and Sylvite Chemical Formula

While comparing Ettringite and Sylvite 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 Sylvite chemical formula.

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Ettringite and Sylvite Specific Gravity

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