Jiménez, Jose A.Padilla, IsabelLópez Delgado, AuroraFillali, LailaLópez Andrés, Sol2023-06-192023-06-192015-011546-542X; Essn: 1744-7402https://10.1111/ijac.12283https://hdl.handle.net/20.500.14352/34241Boehmite synthesized through a sol‐gel route from a nonconventional raw material, as an aluminum waste, was calcined at temperatures between 500 and 1500°C. Quantification of crystalline phases was performed by the Rietveld refinement of the XRD patterns. γ‐Al2O3 is formed at 500°C, and up to 1000°C, is the dominant phase. At temperatures ranging from 1000 to 1400°C, it was observed the appearance of a four‐phase region. The complete transformation into α‐Al2O3 lasts until 12 h at 1400°C or at higher temperatures. The presence of an amorphous phase in calcined samples was confined by direct comparison with a standard of pure α‐Al2O3.]engjournal articlehttps://doi.org/10.1111/ijac.12283https://ceramics.onlinelibrary.wiley.com/toc/17447402/2015/12/1https://ceramics.org/open access552.1549Mineralogía (Geología)Petrología2506.11 Mineralogía