Hollandite and Powellite Physical Properties

Hollandite

Powellite

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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

5.054.23

1 7.18

1.5 Fracture

Brittle, Metallic

UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

1.6 Cleavage

Distinct / Good, Prismatic

{111} Distinct

1.7 Mohs Hardness

4-63.5-4

2 10

1.8 Chemical Composition

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

CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Hollandite and Powellite Chemical Formula

While comparing Hollandite and Powellite 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 Powellite chemical formula.

Chemical formula of Hollandite- Ba(Mn++++,Mn++)8O16
Chemical formula of Powellite- CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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Hollandite and Powellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hollandite and Powellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hollandite and Powellite Optical Properties during the identification of gemstone. Specific gravity of Hollandite is 4.23 whereas that of Powellite is 4.23.