Galena and Hollandite Physical Properties

Galena

Hollandite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

6.235.05

1 7.18

1.5 Fracture

Subconchoidal, Brittle, Metallic

Brittle, Metallic

1.6 Cleavage

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

Distinct / Good, Prismatic

1.7 Mohs Hardness

2.5-2.754-6

2 10

1.8 Chemical Composition

PbS

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

Galena and Hollandite Chemical Formula

While comparing Galena 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 Galena and Hollandite chemical formula.

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

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Galena and Hollandite Specific Gravity

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