Ettringite and Hanksite Physical Properties

Ettringite

Hanksite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Partially soluble in water

Readily soluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

1.772.562

1 7.18

1.5 Fracture

Not Available

Uneven, Conchoidal, Brittle

1.6 Cleavage

Perfect on {10 1 0}

Good on {0001}

1.7 Mohs Hardness

2-2.53-3.5

2 10

1.8 Chemical Composition

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

KNa22(SO4)9(CO3)2Cl

Ettringite and Hanksite Chemical Formula

While comparing Ettringite and Hanksite 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 Hanksite chemical formula.

Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Hanksite- KNa22(SO4)9(CO3)2Cl

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Ettringite and Hanksite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Hanksite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Hanksite Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 2.562 whereas that of Hanksite is 2.562.