Notably, Hanghofer et al. have put forth an alternative perspective based on their research, offering new insights into the diffusion mechanisms within argyrodite materials, especially in cases where X represents Cl, Br, or I. Their investigation employed 31 P magic angle spinning (MAS) NMR to probe the rotational movements of the PS 4 3-units within these materials, yielding the following observations: In cases where X corresponds to Cl or Br, they detected a coupling between the rotational motion of PS 4 3-units and the diffusion of lithium ions, as illustrated in Fig. . This coupling promotes inter-cage jumps of lithium ions, facilitating long-range diffusion within the material. However, in the instance where X represents I, they noted that, despite the presence of local lithium-ion motion, lithium ions do not exhibit long-range inter-cage diffusion. This is attributed to the decoupling of PS 4 3-unit motion from lithium-ion diffusion, primarily due to the soft lattice nature of the material.