Arfvedsonite and Gahnite Physical Properties

Arfvedsonite

Gahnite

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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

3.3-3.54.00-4.62

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic, Brittle, Metallic

Conchoidal, Uneven

1.6 Cleavage

Perfect on [110]

Indistinct parting on [111]

1.7 Mohs Hardness

5-67.5-8

2 10

1.8 Chemical Composition

NaNa2(Fe++4Fe+++)Si8O22(OH)2

ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Arfvedsonite and Gahnite Chemical Formula

While comparing Arfvedsonite and Gahnite 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 Arfvedsonite and Gahnite chemical formula.

Chemical formula of Arfvedsonite- NaNa2(Fe++4Fe+++)Si8O22(OH)2
Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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Arfvedsonite and Gahnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Arfvedsonite and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Arfvedsonite and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Arfvedsonite is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.