Goethite and Hauyne Physical Properties

Goethite

Hauyne

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

HCl soluble

Gelatinises in acids

1.3 Durability

Not Available

1.4 Specific Gravity

4.27-4.292.4-2.5

1 7.18

1.5 Fracture

Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).

Uneven, Conchoidal, Brittle

1.6 Cleavage

Perfect {010}

Distinct on {110}

1.7 Mohs Hardness

5-5.55-6

2 10

1.8 Chemical Composition

FeO(OH)Arthur Thomas , Gemstones (2009)

(Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2

Goethite and Hauyne Chemical Formula

While comparing Goethite and Hauyne 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 Goethite and Hauyne chemical formula.

Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
Chemical formula of Hauyne- (Na,Ca)4-8Al6Si6(O,S)24(SO4,Cl)1-2

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Goethite and Hauyne Specific Gravity

Another important criteria for qualitative analysis of gemstones is Goethite and Hauyne Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Hauyne Optical Properties during the identification of gemstone. Specific gravity of Goethite is 2.4-2.5 whereas that of Hauyne is 2.4-2.5.