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Hematite (AE) or haematite (BE) is the mineral form of Iron(III) oxide, (Fe<sub>2</sub>O<sub>3</sub>), one of several iron oxides. Hematite crystallizes in the rhombohedral system, and it has the same crystal structure as ilmenite and as corundum. Hematite and ilmenite form a complete solid solution at temperatures above 950°C.