Kainite and Ettringite Physical Properties

Kainite

Ettringite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Partially soluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

2.151.77

1 7.18

1.5 Fracture

Splintery, Conchoidal, Brittle

Not Available

1.6 Cleavage

{001}, perfect

Perfect on {10 1 0}

1.7 Mohs Hardness

2.5-32-2.5

2 10

1.8 Chemical Composition

Not Available

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

Kainite and Ettringite Chemical Formula

While comparing Kainite 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 Kainite 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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Kainite and Ettringite Specific Gravity

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