Ettringite and Aegirine Physical Properties

Ettringite

Aegirine

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Partially soluble in water

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.773.50-3.60

1 7.18

1.5 Fracture

Not Available

Uneven, Brittle, Metallic, Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

Perfect on {10 1 0}

Good on {110}, (110) ^ (1 1 0) ≈87°; parting on {100}

1.7 Mohs Hardness

2-2.56

2 10

1.8 Chemical Composition

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

(Na,Fe,Ca)Si 2O 6Ulrich Henn and Claudio C.

Ettringite and Aegirine Chemical Formula

While comparing Ettringite and Aegirine 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 Aegirine chemical formula.

Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Aegirine- (Na,Fe,Ca)Si 2O 6Ulrich Henn and Claudio C.

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Ettringite and Aegirine Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Aegirine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Aegirine Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 3.50-3.60 whereas that of Aegirine is 3.50-3.60.