Vlasovite and Ettringite Physical Properties

Vlasovite

Ettringite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Nearly insoluble in HCl and HNO₃

Partially soluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

2.971.77

1 7.18

1.5 Fracture

Conchoidal, Brittle

Not Available

1.6 Cleavage

Distinct on {010}

Perfect on {10 1 0}

1.7 Mohs Hardness

62-2.5

2 10

1.8 Chemical Composition

Not Available

Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Vlasovite and Ettringite Chemical Formula

While comparing Vlasovite 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 Vlasovite and Ettringite chemical formula.

Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Vlasovite and Ettringite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Vlasovite and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vlasovite and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Vlasovite is 1.77 whereas that of Ettringite is 1.77.