Ettringite and Hackmanite Physical Properties

Ettringite

Hackmanite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Partially soluble in water

Not Available

1.1 Durability

Not Available

1.3 Specific Gravity

1.772.27-2.33

1 7.18

1.14 Fracture

Not Available

UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)

1.15 Cleavage

Perfect on {10 1 0}

Not Available

1.16 Mohs Hardness

2-2.55.5-6

2 10

1.24 Chemical Composition

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

Na 8Al 6Si 6O 24Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006)

Ettringite and Hackmanite Chemical Formula

While comparing Ettringite and Hackmanite 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 Hackmanite chemical formula.

Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Hackmanite- Na 8Al 6Si 6O 24Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006)

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Ettringite and Hackmanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Hackmanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Hackmanite Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 2.27-2.33 whereas that of Hackmanite is 2.27-2.33.