Hackmanite and Sellaite Physical Properties

Hackmanite

Sellaite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.27-2.333.14-3.16

1 7.18

1.5 Fracture

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

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle

1.6 Cleavage

Not Available

Perfect on {010} and {110}

1.7 Mohs Hardness

5.5-65-5.5

2 10

1.8 Chemical Composition

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

MgF 2Ulrich Henn and Claudio C.

Hackmanite and Sellaite Chemical Formula

While comparing Hackmanite and Sellaite 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 Hackmanite and Sellaite chemical formula.

Chemical formula of Hackmanite- Na 8Al 6Si 6O 24Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Sellaite- MgF 2Ulrich Henn and Claudio C.

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Hackmanite and Sellaite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hackmanite and Sellaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hackmanite and Sellaite Optical Properties during the identification of gemstone. Specific gravity of Hackmanite is 3.14-3.16 whereas that of Sellaite is 3.14-3.16.