Apatite and Taaffeite Physical Properties

Apatite

Taaffeite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.16-3.23

3.60-3.61

1.5 Fracture

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

Conchoidal

1.6 Cleavage

[0001] indistinct, [1010] indistinct

Imperfect/fair/absent

1.7 Mohs Hardness

8-8.5

1.8 Chemical Composition

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

Mg 3Al 8BeO 16Walter Schumann , Gemstones of the world (2001) More from other references

Apatite and Taaffeite Chemical Formula

While comparing Apatite and Taaffeite 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 Apatite and Taaffeite 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
Chemical formula of Taaffeite- Mg 3Al 8BeO 16Walter Schumann , Gemstones of the world (2001) More from other references

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Apatite and Taaffeite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Taaffeite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Taaffeite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 3.60-3.61 whereas that of Taaffeite is 3.60-3.61.