Arfvedsonite and Dravite Physical Properties

Arfvedsonite

Dravite

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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

3.3-3.53.03-3.18

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic, Brittle, Metallic

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

1.6 Cleavage

Perfect on [110]

{???} Indistinct

1.7 Mohs Hardness

5-67-7.5

2 10

1.8 Chemical Composition

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

Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

Arfvedsonite and Dravite Chemical Formula

While comparing Arfvedsonite and Dravite 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 Dravite chemical formula.

Chemical formula of Arfvedsonite- NaNa2(Fe++4Fe+++)Si8O22(OH)2
Chemical formula of Dravite- Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

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Arfvedsonite and Dravite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Arfvedsonite and Dravite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Arfvedsonite and Dravite Optical Properties during the identification of gemstone. Specific gravity of Arfvedsonite is 3.03-3.18 whereas that of Dravite is 3.03-3.18.