Figure 5
Representative atomic resolution EDX images for B6TFMO-B ((a and b)) and B6TFMO-A ((c and d)) in a region of the crystallite displaying OPBs/stacking faults. (a and c) annular dark-field images and (b and d) corresponding EDX chemical composition overlay maps showing annular dark-field image (white), Bi (green), Ti (blue), Mn (pink), Fe (red). Yellow arrows demonstrate the positions of the OPBs, the blue rectangle A signifies a stacking fault region and the green ellipsoid B designates a region in the vicinity of an OPB. The numbers displayed in red designate the number of PK layers (m) in the region designated by the red bar. The majority of the sample has an m = 5 structure. PK layers used for quantification are labelled by the numbers in white. The relative B-site proportions of Ti, Mn and Fe were quantified by taking horizontal line profiles of the EDX data across regions indicated and are tabulated in Tables 1 and 2.
