The decomposition products obtained after pyrolysis of the
precursors in air at 500 ◦C for 1 h were analyzed by X-Ray diffraction
(XRD). As evident from Fig. 1, the diffractograms of (a) and
(c) show one single phase each, identified as hexagonal ZnO
(P63mc, a = 3.2490(1)Å and c = 5.2052(6)Å) and cubic NiO (Fm–3m,
a = 4.187Å) respectively.