Hollandite and Brookite Physical Properties

Hollandite

Brookite

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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

5.053.87-4.14

1 7.18

1.5 Fracture

Brittle, Metallic

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

Distinct / Good, Prismatic

Poor on {120}, in traces on {001}

1.7 Mohs Hardness

4-65.5-6

2 10

1.8 Chemical Composition

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

TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Hollandite and Brookite Chemical Formula

While comparing Hollandite and Brookite 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 Hollandite and Brookite chemical formula.

Chemical formula of Hollandite- Ba(Mn++++,Mn++)8O16
Chemical formula of Brookite- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Hollandite Vs Larvikite

Hollandite and Brookite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hollandite and Brookite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hollandite and Brookite Optical Properties during the identification of gemstone. Specific gravity of Hollandite is 3.87-4.14 whereas that of Brookite is 3.87-4.14.