Apatite and Hibschite Physical Properties

Apatite

Hibschite

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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

3.16-3.233.05-3.08

1 7.18

1.5 Fracture

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

Uneven, Uneven, Irregular, Management Team (2012), Conchoidal, Brittle

1.6 Cleavage

[0001] indistinct, [1010] indistinct

None

1.7 Mohs Hardness

56.5

2 10

1.8 Chemical Composition

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

Ca 3Al 2(SiO 4) 3-x(OH) 4x (x=0.2 to 1.5)Anthony et al , Handbook of mineralogy (2001)

Apatite and Hibschite Chemical Formula

While comparing Apatite and Hibschite 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 Hibschite 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 Hibschite- Ca 3Al 2(SiO 4) 3-x(OH) 4x (x=0.2 to 1.5)Anthony et al , Handbook of mineralogy (2001)

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Apatite and Hibschite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Hibschite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Hibschite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 3.05-3.08 whereas that of Hibschite is 3.05-3.08.