Nuclear magnetic resonance H magic-angle spinning (1 to 12kHz) measurements were performed on HNbWO6•xH2O defect pyrochlores, where x was 0 or 1. A variation of line-width with spinning rate in the 2 systems revealed the occurrence of motions with differing time-scales. It was concluded that the conduction mechanisms in both compounds were similar, but proton hopping in the hydrated form was assisted by the water of hydration.

N.Binesh, V.Bhat, S.V.Bhat: Solid State Ionics, 1996, 86-88[1], 665-8