Refinement of the NPD data (Fig. and fig. ) identified two distinct Li + sites and partial occupancy of deuterium ions (D + ) in 7 Li-2-SAPO-RHO (Fig. , G and H, figs. S42 to S44, and tables S19 and S20). Combining cRED and NPD results, it was determined that, per unit cell, 2.4 Li + ions are located at the center of the 6MRs (Li1), 0.8 Li + ions occupy off-center positions in the elliptical 8MRs (Li2), and 2.0 D + ions are distributed within the elliptical 8MRs.