Neptunite and Allanite Physical Properties

Neptunite

Allanite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.19-3.233.40-4.20

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

{110} good

Not Available

1.7 Mohs Hardness

5-6Not Available

2 10

1.8 Chemical Composition

KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)

Not Available

Neptunite and Allanite Chemical Formula

While comparing Neptunite and Allanite 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 Neptunite and Allanite chemical formula.

Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)

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Neptunite and Allanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Neptunite and Allanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Neptunite and Allanite Optical Properties during the identification of gemstone. Specific gravity of Neptunite is 3.40-4.20 whereas that of Allanite is 3.40-4.20.