A 1H magic-angle spinning nuclear magnetic resonance study was made of layered HNbWO6•xH2O, where x was 1.5 or 0.5, at room temperature using spinning speeds of 1 to 12kHz. It was found that the results for fully hydrated material (x = 1.5) were consistent with a model which involved the diffusion of H3O+ ions within the layers. In the case of partially dehydrated material (x = 0.5), an exchange between cage protons and H3O+ protons led to protonic conduction.

N.Binesh, V.Bhat, S.V.Bhat: Solid State Ionics, 1996, 86-88[1], 609-11