A comprehensive investigation into bulk conductivity within the argyrodite material Li 6 PS 5 Cl has been conducted, employing a combination of 7 Li nuclear magnetic resonance (NMR) experiments and DFT-based MD simulations by Yu et al. . This study has shed light on two distinct lithium-ion diffusion mechanisms within this material: (1) Local Transitions: The study has revealed that lithium ions within Li 6 PS 5 Cl undergo local transitions within the cage-like structures formed by their positions around the sulfur (S) or chlorine (Cl) atoms. These local transitions represent a crucial aspect of lithium-ion mobility within the material. (2) Inter-Cage Transitions: In addition to local transitions, the study has identified inter-cage transitions as a limiting step for macroscopic lithium-ion diffusion within the crystalline bulk structure of Li 6 PS 5 Cl. This implies that the movement of lithium ions between different cage-like structures is a critical factor influencing the overall lithium-ion mobility in the material.