Pierre Berthier
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Pierre Berthier (July 3, 1782 – August 24, 1861) was a French geologist.
In 1821 while working in the village Les Baux de Provence in southern France, he discovered that the mineral bauxite contains aluminum; the mineral is named for the place of its discovery.
He also discovered the mineral Berthierite which was named after him.
Berthier is also noted for his research into blast furnaces and for the utilization of phosphates by plants.