“…To our knowledge, no experimental or theoretical results on phonons have been published for the high-pressure phase of actinide dioxides. For UO 2 in the F m3m phase, i.e., at ambient pressure, several experimental techniques have been used to evaluate its vibrational properties, namely inelastic neutron scattering [55,56] and infrared and Raman spectroscopy [1,57,58]. Also, from the theoretical side, this system has been widely investigated, e.g., through LDA+DMFT [12], MD [59], GGA [60], and LDA/GGA+U +SOC [39].…”