What order is the change in the shift or intensity of a XRD pattern when there is an impurity in the crystal lattice?

I doped a fluoride perovskite LiMgF3 with different concentrations of Cr (0.25%mol and 0.5%mol). The XRD pattern of LiMgF3 shows the highest peak at 38.9847, but LiMgF3:Cr 0.25%mol shows this peak...

07 July 2020 5,801 4 View