Please compare the observed peaks with peaks of the same material in the previous paper.
or
You can use Xpert Highscore software for the identification of the phase.
I think this is the easiest way to determine the phase from the XRD otherwise we will do a long theoretical calculation to determine the phase of our material.
Phase ID uses the position of peaks, and sometimes their intensity, to determine what is present. This is done by matching peak positions with a known library of spectra. Most researchers are very familiar with their specimens, are are likely to know the few possible phases that may be present.