Apatite and Hollandite Physical Properties

Apatite

Hollandite

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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

3.16-3.235.05

1 7.18

1.5 Fracture

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

Brittle, Metallic

1.6 Cleavage

[0001] indistinct, [1010] indistinct

Distinct / Good, Prismatic

1.7 Mohs Hardness

54-6

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

Ba(Mn++++,Mn++)8O16

Apatite and Hollandite Chemical Formula

While comparing Apatite and Hollandite 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 Hollandite 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 Hollandite- Ba(Mn++++,Mn++)8O16

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Apatite and Hollandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Hollandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Hollandite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 5.05 whereas that of Hollandite is 5.05.