Figure 5

Experimental (left) and calculated (right) THz spectra of MPC. Both of these spectra are vertically offset. The FWHM of calculated spectra is set to the same value as that of the experimental peak at 37 cm⁻¹ at 12 K (FWHM = 2.8 cm⁻¹). The four modes obtained in the calculations are denoted as ν₆–ν₉.