Hollandite and Nosean Physical Properties

Hollandite

Nosean

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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

5.052.30-2.40

1 7.18

1.5 Fracture

Brittle, Metallic

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

1.6 Cleavage

Distinct / Good, Prismatic

{110} Perfect

1.7 Mohs Hardness

4-6Not Available

2 10

1.8 Chemical Composition

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

Na 8Al 6Si 6O 24(SO 4) · H 2OAnthony et al , Handbook of Mineralogy (2001)

Hollandite and Nosean Chemical Formula

While comparing Hollandite and Nosean 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 Nosean chemical formula.

Chemical formula of Hollandite- Ba(Mn++++,Mn++)8O16
Chemical formula of Nosean- Na 8Al 6Si 6O 24(SO 4) · H 2OAnthony et al , Handbook of Mineralogy (2001)

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Hollandite and Nosean Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hollandite and Nosean Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hollandite and Nosean Optical Properties during the identification of gemstone. Specific gravity of Hollandite is 2.30-2.40 whereas that of Nosean is 2.30-2.40.