180784.fig.006a
(a)
180784.fig.006b
(b)
Figure 6: Raman shifts as a function of pressure for ionic crystal (a). Opened squares refer to ambient temperature data obtained on compression and solid squares represent the data obtained at 600 K on decompression. Green and red lines correspond to mode pressure evolution at room temperature and at 600 K, respectively. The influence of temperature on the vibrational frequencies can be seen at a zoomed scale (b).