The solid state reaction was comple

The solid state reaction was completed after sintering at 1200 °C, so the observed Raman spectrum shows only
ZrTiO4 bands at 134, 162, 262, 339, 405, 541, 591, 646, 716 and 799 cm-1 (Fig. 1, ZT-1200). ZrTiO4 crystallizes
with Pnab space group and α-PbO structure type, having two formula units in unit cell. Thus, ZrTiO4 has 33 optically
active modes of vibration of which 18 are Raman active modes [16]. We observed lower number of the
bands, which can be explained by overlapping of the broadened bands. The randomly distributed cations Zr4+
and Ti4+ within M-site in the crystal structure influence the band broadening. Moreover, since the ceramics was prepared
from high-energy ball milled precursor, the oxide defects and nonstoichiometric variations of Zr/Ti ratio are
also expected [16, 17].