Phlogopite and Nepheline Physical Properties

Phlogopite

Nepheline

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1 Physical Properties

1.1 Tenacity

Tough

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.78-2.852.55-2.65

1 7.18

1.5 Fracture

None, Uneven

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

Perfect basal (001)

[1010] Poor

1.7 Mohs Hardness

2-2.55-6

2 10

1.8 Chemical Composition

Not Available

Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.

Phlogopite and Nepheline Chemical Formula

While comparing Phlogopite and Nepheline 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 Phlogopite and Nepheline chemical formula.

Chemical formula of Nepheline- Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.

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Phlogopite and Nepheline Specific Gravity

Another important criteria for qualitative analysis of gemstones is Phlogopite and Nepheline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phlogopite and Nepheline Optical Properties during the identification of gemstone. Specific gravity of Phlogopite is 2.55-2.65 whereas that of Nepheline is 2.55-2.65.