In the Fig. of Ohsaka and coworkers' research, we can see that the "516 cm -1 Raman band which occurs at room temperature is apparently split into two peaks centred at 519 and 513 cm -1 at low temperature (73 K). On the other hand, no Raman band which could be unambiguously assigned to the A1g mode was observed in the αxx spectrum at room temperature or at low temperatures. Since the A1g mode is the Ti-O stretching type vibration one of the two bands at 519 and 513 cm -1 corresponds to the A1g mode and consequently, the other to the B1g mode. The 399 cm -1 band is assigned to one of the two B1g modes" . Regarding the Fig. in Ohsaka et al., the position of the peak at room temperature seems being at a value of 517 cm -1 , rather than 516 cm -1 .