a mineral, hydrated aluminum oxide, Al 2 O 3 ·3H 2 O, occurring in whitish or grayish crystals and masses: an important constituent of bauxite ore.
Also called hydrargillite.

1815–25; named after George Gibbs (died 1833), American mineralogist; see -ite1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
gibbsite (ˈɡɪbzaɪt)
a mineral consisting of hydrated aluminium oxide: a constituent of bauxite and a source of alumina. Formula: Al(OH)3
[C19: named after George Gibbs (died 1833), American mineralogist]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Encyclopedia Britannica


the mineral aluminum hydroxide [Al(OH)3] an important constituent of bauxite (q.v.) deposits, particularly those in the Western Hemisphere, where it occurs as white, glassy crystals, earthy masses, or crusts. In significant deposits it is of secondary origin, but small-scale hydrothermal sources are known. Under extreme weathering conditions, it may develop from any aluminous material, especially feldspars and feldspathoids; it may form from these directly or from boehmite or after the intermediate formation of clay minerals. Gibbsite is prominent in bauxites from Arkansas, Jamaica, Suriname, Guyana, Brazil, West Africa, and India. Synthetic gibbsite is made from bauxite or high-alumina materials for use in the production of aluminum metal and alumina chemicals. For detailed physical properties, see oxide mineral (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
For gibbsite the database is more limited, except for studies conducted in basic solutions.
The liquor is usually seeded with fine gibbsite seed from previous cycles t o initiate precipitation.
The liquor is usually seeded with fine gibbsite seed from previous cycles to initiate precipitation.
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