Apatite and Periclase Physical Properties

Apatite

Periclase

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.16-3.23

3.7-3.9

1.5 Fracture

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

Conchoidal, Brittle

1.6 Cleavage

[0001] indistinct, [1010] indistinct

{001} perfect; {111} imperfect, may exhibit parting on , {011}

1.7 Mohs Hardness

5.5-6

1.8 Chemical Composition

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

MgOMichael OâDonoghue , Gems, Sixth Edition (2006)

Apatite and Periclase Chemical Formula

While comparing Apatite and Periclase 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 Periclase 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 Periclase- MgOMichael OâDonoghue , Gems, Sixth Edition (2006)

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Apatite and Periclase Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Periclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Periclase Optical Properties during the identification of gemstone. Specific gravity of Apatite is 3.7-3.9 whereas that of Periclase is 3.7-3.9.