Pawley fitting has been performed on the total set of XRD profiles using fixed relative diffraction peak intensities extracted
from the PDF database for each identified phase. Because of the low-energy resolution of the monochromator, the peak profile functions were approximated by Gaussians. For each of the eight identified crystallographic phases, five parameters were refined in a least-squares fashion: the sample–detector distance, the Pawley scaling factor and three so-called Caglioti parameters that parameterize the diffraction peak widths of each phase. All other parameters were kept constant. In addition, the corresponding XRF spectra were fitted using the appropriate spectral K and L line groups of the elements present by means of the PyMCA program.