Apophyllite and Apatite Physical Properties

Apophyllite

Apatite

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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

2.30-2.503.16-3.23

1 7.18

1.5 Fracture

Uneven, UnevenArthur Thomas, Gemstones (2009)

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

1.6 Cleavage

Perfect on (001)

[0001] indistinct, [1010] indistinct

1.7 Mohs Hardness

4.5-55

2 10

1.8 Chemical Composition

KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

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

Apophyllite and Apatite Chemical Formula

While comparing Apophyllite 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 Apophyllite and Apatite chemical formula.

Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
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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Apophyllite and Apatite Specific Gravity

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