Apatite and Esperite Physical Properties

Apatite

Esperite

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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

3.16-3.234.28-4.42

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

[0001] indistinct, [1010] indistinct

Distinct on [010] and [100] poor on [101]

1.7 Mohs Hardness

55-5.5

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

PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)

Apatite and Esperite Chemical Formula

While comparing Apatite and Esperite 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 Esperite 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 Esperite- PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)

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Apatite and Esperite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Esperite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Esperite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 4.28-4.42 whereas that of Esperite is 4.28-4.42.