High-Pressure Synthesis and Study of and Ionic Solids
Figure 3
Raman spectra of (a) ionic crystal at 2.8 GPa, (b) a mixture of ionic and
molecular crystals at 2 GPa, and (c)
molecular crystal at 1.7 GPa, showing the phase transition of
molecular compound from ionic to neutral form. The assignment of the internal
vibrational modes in (c) corresponds to symmetrical dimer [14].
