To highlight the intricate relationship between tensor shape and orientation in -LPS that leads to the very similar and narrow ! Q distributions displayed in Figure (left) we also compute a theoretical autocorrelation function hACF C Q i of the orientation-independent coupling constant, C Q , experienced by the Li ions during their motion through the crystalline model in the MD simulation. We note that this is not a directly accessible quantity in the SAE experiment . We compute this hACF C Q i in a similar fashion to that for ! Q given in Equation ,