Apatite and Carnallite Physical Properties

Apatite

Carnallite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.16-3.231.6

1 7.18

1.5 Fracture

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

Violet, Conchoidal, Brittle, Conchoidal, Brittle

1.6 Cleavage

[0001] indistinct, [1010] indistinct

None

1.7 Mohs Hardness

52.5

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

KMgCl3•6(H2O)

Apatite and Carnallite Chemical Formula

While comparing Apatite and Carnallite 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 Carnallite 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 Carnallite- KMgCl3•6(H2O)

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Apatite and Carnallite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Carnallite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Carnallite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 1.6 whereas that of Carnallite is 1.6.