Gibbsite is a mineral with a chemical formula of Al(OH)3. The word is pronounced as ˈɡɪbsaɪt, with a hard "g" sound at the beginning, followed by a short "i" sound and a long "a" sound. The second syllable is pronounced with a short "i" sound, and the final "t" is pronounced with a soft "t" sound. The spelling of the word "gibbsite" is derived from its namesake, the French mineralogist Gilbert Joseph Adam, who first discovered the mineral in 1806.
Gibbsite is a mineral and a common form of aluminum hydroxide. It belongs to the mineral class of hydroxides and is known for its characteristic crystal structure. Gibbsite is chemically represented as Al(OH)3, with aluminum (Al) in its trivalent state and hydroxide ions (OH-) combined in a crystalline form.
In terms of physical properties, gibbsite typically occurs as platy or tabular crystals, with a pearly or vitreous luster and a white to gray color. It has a relatively low density and hardness and is therefore considered a soft mineral. Gibbsite is commonly found in bauxite deposits, which are the primary source of aluminum ore, and it may also occur in aluminum-rich metamorphic rocks.
Gibbsite has significant industrial importance, particularly as a source of aluminum. It is widely used in the production of aluminum metal, as the primary source for alumina, which is refined into metallic aluminum. Gibbsite is also utilized as a filler in the paper and paint industries, as an ingredient in some pharmaceutical products, and in various other applications.
In conclusion, gibbsite is a mineral primarily composed of aluminum hydroxide. It is notable for its crystal structure, appearance, and extensive use as a source of aluminum in industry.
The word "gibbsite" was named after George Gibbs, an American mineralogist who first discovered the mineral in 1820. The suffix "-ite" is a common mineral suffix used to indicate a mineral name.