Fig. 7. (a) Diffusion coefficient of water molecules and (b) diffusion coefficient of hydronium ion in relation to hydration level as determined by our simulation (rhombus), an NMR⁵⁸ experiment (circle), QENS⁵⁹ experiment (triangle), Devanathan et al. (square),⁴³ Tsung et al. (hexagon)⁴⁸ respectively.