180784.fig.007a
(a)
180784.fig.007b
(b)
Figure 7: Pressure evolution of the Raman spectra of at 600 K (a) and Raman spectra of region at 11.3 GPa, 8.4 and 5.6 GPa at ambient temperature (b). A shoulder in the vicinity of vibration mode indicates an orientational and/or site mobility of ionic complexes in ionic crystal.