Hollandite and Galena Physical Properties

Hollandite

Galena

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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

5.056.23

1 7.18

1.5 Fracture

Brittle, Metallic

Subconchoidal, Brittle, Metallic

1.6 Cleavage

Distinct / Good, Prismatic

Cubic perfect on [001], parting on [111]

1.7 Mohs Hardness

4-62.5-2.75

2 10

1.8 Chemical Composition

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

PbS

Hollandite and Galena Chemical Formula

While comparing Hollandite and Galena 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 Galena chemical formula.

Chemical formula of Hollandite- Ba(Mn++++,Mn++)8O16
Chemical formula of Galena- PbS

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Hollandite and Galena Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hollandite and Galena Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hollandite and Galena Optical Properties during the identification of gemstone. Specific gravity of Hollandite is 6.23 whereas that of Galena is 6.23.