Hibschite and Ettringite Physical Properties

Hibschite

Ettringite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Partially soluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

3.05-3.081.77

1 7.18

1.5 Fracture

Uneven, Uneven, Irregular, Management Team (2012), Conchoidal, Brittle

Not Available

1.6 Cleavage

None

Perfect on {10 1 0}

1.7 Mohs Hardness

6.52-2.5

2 10

1.8 Chemical Composition

Ca 3Al 2(SiO 4) 3-x(OH) 4x (x=0.2 to 1.5)Anthony et al , Handbook of mineralogy (2001)

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

Hibschite and Ettringite Chemical Formula

While comparing Hibschite 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 Hibschite and Ettringite chemical formula.

Chemical formula of Hibschite- Ca 3Al 2(SiO 4) 3-x(OH) 4x (x=0.2 to 1.5)Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Hibschite and Ettringite Specific Gravity

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