Goethite and Catapleiite Physical Properties

Goethite

Catapleiite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

HCl soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.27-4.292.72

1 7.18

1.5 Fracture

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

Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

Perfect {010}

{110} Perfect, {010} Perfect

1.7 Mohs Hardness

5-5.55-6

2 10

1.8 Chemical Composition

FeO(OH)Arthur Thomas , Gemstones (2009)

Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Goethite and Catapleiite Chemical Formula

While comparing Goethite and Catapleiite 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 Catapleiite chemical formula.

Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
Chemical formula of Catapleiite- Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Goethite and Catapleiite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Goethite and Catapleiite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Catapleiite Optical Properties during the identification of gemstone. Specific gravity of Goethite is 2.72 whereas that of Catapleiite is 2.72.