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Bauxite

Page history last edited by Orion 12 years, 3 months ago

Uses

 Bauxite is the most common ore of aluminum. It is also used as an abrasive, however, this use is now being replaced by synthetic materials.

Color

 white, gray, yellow, red

Streak

 normally white but may streak other colors if the specimen is stained

Luster

 dull to earthy

Diaphaneity

 translucent

Cleavage

 because bauxite is a mixture of gibbsite, boehmite and diaspore, it has no cleavage properties of its own

Hardness

 1 to 3

Specific Gravity

 2 - 2.5

Distinguishing
Characteristics

 pisolitic structure, color

Crystal System

 Bauxite is a mixture of Diaspore (orthorhomic), Gibbsite (monoclinic), and Boehmite (orthorhombic)

Chemical Classification

 oxide / hydroxide

Chemical Composition

 gibbsite, Al(OH)3
boehmite, AlO(OH)
diaspore, AlO(OH)

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