Phlogopite and Apatite Physical Properties

Phlogopite

Apatite

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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

2.78-2.853.16-3.23

1 7.18

1.5 Fracture

None, Uneven

Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal to uneven

1.6 Cleavage

Perfect basal (001)

[0001] indistinct, [1010] indistinct

1.7 Mohs Hardness

2-2.55

2 10

1.8 Chemical Composition

Not Available

Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references

Phlogopite and Apatite Chemical Formula

While comparing Phlogopite and Apatite 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 Apatite chemical formula.

Chemical formula of Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references

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Phlogopite and Apatite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Phlogopite and Apatite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phlogopite and Apatite Optical Properties during the identification of gemstone. Specific gravity of Phlogopite is 3.16-3.23 whereas that of Apatite is 3.16-3.23.