Afghanite and Hollandite Physical Properties

Afghanite

Hollandite

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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

2.55-2.655.05

1 7.18

1.5 Fracture

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

Brittle, Metallic

1.6 Cleavage

Perfect {10 1 0}

Distinct / Good, Prismatic

1.7 Mohs Hardness

5.5-64-6

2 10

1.8 Chemical Composition

(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)

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

Afghanite and Hollandite Chemical Formula

While comparing Afghanite 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 Afghanite and Hollandite chemical formula.

Chemical formula of Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
Chemical formula of Hollandite- Ba(Mn++++,Mn++)8O16

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Afghanite and Hollandite Specific Gravity

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