“…The XRD patterns for ZnAl 2 O 4 : x Mn 2+ (x = 0.0, 0.5, 1.0, 1.5, & 2.0 mol%) spinel nanostructures prepared by the citrate sol-gel method are shown in figure 1 222), (400), (331), (422), (511), (440), (620), (533) reflection planes which can be assigned to the cubic spinel structure with Fd3m ¯space group [20]. The obtained data of the XRD study is well matched with JCPDS No.…”