Synthesis and characterization of the La1−xSrxFeO3−δ system and the fluorinated phases La1−xSrxFeO3−xFx

The oxyfluorides La1−xSrxFeO3−xFx have been prepared by fluorination of the precursor oxides La1−xSrxFeO3−δ via a low temperature route using poly(vinylidene fluoride) (PVDF). The structures of the oxides and oxyfluorides were investigated in detail by the Rietveld analysis of powder diffraction data. The oxyfluorides crystallize in the space group Pnma for 0

Graphical abstractThe crystal structures of the perovskites La1−xSrxFeO3−xFx for x=0.8 (a), 0.5 (b) and 0.1 (c).Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Oxyfluorides La1−xSrxFeO3−xFx were prepared via low temperature fluorination using PVDF. ► A structural investigation of the compounds La1−xSrxFeO3−xFx is presented in detail. ► Differences in structure are discussed in comparison with the precursor oxides La1−xSrxFeO3−δ.