The unusual morphological structure of the aging products of coprecipitated Fe(III)-Al(III) hydroxides

Aluminum-substituted hematite ( ^*-Fe₂O₃) with an unusual morphological structure is formed upon the aging of coprecipitated Fe(III)-Al(III) hydroxides with excess Fe(III). The crystals of this hematite are found in separate layers and includes seams of an aluminum-containing phase. In samples with excess Al(III) content, the ^*-Fe₂O₃ crystals are found as seams in mixed aggregates of boehmite and ^*-Fe₂O₃.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 931–933, April, 1990.