Hemimorphite and Ettringite Physical Properties

Hemimorphite

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

3.30-3.501.77

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle

Not Available

1.6 Cleavage

Perfect on {110}, poor on {101}, {001} rare

Perfect on {10 1 0}

1.7 Mohs Hardness

52-2.5

2 10

1.8 Chemical Composition

Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Hemimorphite and Ettringite Chemical Formula

While comparing Hemimorphite 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 Hemimorphite and Ettringite chemical formula.

Chemical formula of Hemimorphite- Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Hemimorphite and Ettringite Specific Gravity

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