High-Pressure Synthesis and Study of NO⁺NO₃⁻ and NO₂⁺NO₃⁻ Ionic Solids

Figure 6

Raman shifts as a function of pressure for NO₂⁺NO₃⁻ 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 𝜈₃ 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).

(a)

(b)