Mellite and Goethite Physical Properties

Mellite

Goethite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

HCl soluble

1.3 Durability

Not Available

1.4 Specific Gravity

1.58-1.604.27-4.29

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

{011} Imperfect

Perfect {010}

1.7 Mohs Hardness

25-5.5

2 10

1.8 Chemical Composition

Al 2(Cl 2O 12) · 18H 2OUlrich Henn and Claudio C.

FeO(OH)Arthur Thomas , Gemstones (2009)

Mellite and Goethite Chemical Formula

While comparing Mellite and Goethite 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 Mellite and Goethite chemical formula.

Chemical formula of Mellite- Al 2(Cl 2O 12) · 18H 2OUlrich Henn and Claudio C.
Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

Compare Brown Gemstones

Mellite Vs Morion

Mellite Vs Narsarsukite

Mellite Vs Mother of Pearl

Mellite and Goethite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Mellite and Goethite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Mellite and Goethite Optical Properties during the identification of gemstone. Specific gravity of Mellite is 4.27-4.29 whereas that of Goethite is 4.27-4.29.