Definition of "gibbsite" [gibbs•ite]

• A mineral with monoclinic crystals, usually white but can have different colors, Al(OH)3. (noun)

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• "The montmorillonite group, which often occurs in the drier tropics, has two silica layers for every one gibbsite."
• "In its molecular structure thousands of alternate flat layers of silica (silicon oxide) and gibbsite (aluminium oxide) occur, and give the particles their typical hexagonal plate-like structure."
• "The principal minerals from which aluminum is recovered today are hydrous aluminum oxides, the most prominent of which are bauxite, gibbsite, and diaspore -- the aggregate of all these minerals going commercially under the name of bauxite."