Allanite and Sellaite Physical Properties

Allanite

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

3.40-4.203.14-3.16

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Not Available

Perfect on {010} and {110}

1.7 Mohs Hardness

Not Available5-5.5

2 10

1.8 Chemical Composition

Not Available

MgF 2Ulrich Henn and Claudio C.

Allanite and Sellaite Chemical Formula

While comparing Allanite 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 Allanite and Sellaite chemical formula.

Chemical formula of Sellaite- MgF 2Ulrich Henn and Claudio C.

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Allanite and Sellaite Specific Gravity

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