One is along the c-direction, and involves the Li2 (2c) octahedra, the tetrahedral Li-site Li3(8j) observable from diffraction and the shared In2/Li4 (4g) octahedral site (Figure ). The other path is along the Li-layer in the ab-plane (Figure ), involving both octahedral Li-sites in the layer and vacant tetrahedrons. Considering these two diffusion paths and comparing them to the structural changes found and the findings from AC-impedance (Figure ) and solid-state NMR spectroscopy, the following observations and considerations can be made.