Combination of variable temperature incoherent quasielastic neutron-scattering (q.e.n.s.) and 1H n.m.r. relaxation time measurements allows the characterisation of dynamic processes associated with proton transport in 12-tungstophosphoric acid 14-hydrate; q.e.n.s. identifies 180°-flips of H2O and enables n.m.r. data to be interpreted in terms of this reorientation and H+ self-diffusion [Dt(295 K)∼ 10–7 cm2 s–1].
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Slade et al. (1987) studied this question.
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