Second, it is found that the reflections corresponding to c-BiF3, e.g. the (111) and ( ) reflections (marked by white-dash rectangles in Figure ), do not only change their intensity but also show a strong shift to higher diffraction angles (smaller cell volumes). The intensity of c-BiF3 reflections strongly decrease and the phase fully disappears once the metastable phase discussed in the previous paragraphs starts to appear and peaks in intensity respectively.