Local structure of perovskite-type oxyfluorides, BaFeOF and BaInOF

Katsumata, Tetsuhiro*; Inaguma, Yoshiyuki*; Aimi, Akihisa*; Yoneda, Yasuhiro   

The search for novel materials requires the search for compounds with compositional flexibility. Mixed anion compounds such as perovskite oxyfluorides are promising materials. In these compounds, the relationship between structure and tolerance factor t is interesting. In this study, perovskite oxyfluorides with various t, BaInOF (t=0.97), BaScOF (t=0.99) and BaFeOF, were synthesized and their local and average structures were investigated by X-ray diffraction and pair distribution (PDF) methods, respectively. Furthermore, the relationship between the structure and the tolerance factor t was discussed.