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- W2023482147 abstract "Pulsed field gradient NMR measurements are made of the proton diffusion coefficient in proton uranyl periodates. The conductivity and the diffusion coefficient are sensitive to relative humidity, and the measurements are made under carefully controlled relative humidity conditions. It is found that the activation energy for diffusion is consistently smaller than that required for conductivity, perhaps due to the necessity in the conduction process of forming carriers, whereas diffusion is sensitive only to carrier mobilities. The activation energy decreases with increasing humidity, perhaps reflecting the extent of completeness of hydrogen bonded networks.On present des resultats des mesures du coefficient de diffusion des protons en complexes protonuranyle-periodiques par la methode de MRN aux impulses du gradient de champ magnetique. Laconductivite et le coefficient de diffusion sont sensitifs a l'humidite et les mesures ont ete effectuees dans les conditions de l'humidite controlees. On a trouve que l'energie d'activaction de diffusion est beaucoup moindre que celle-la de conductivite. Ca probablement est lie avec la necessite de formation de porteurs de charge au cours du processus de conduction, tandis que la diffusion est sensitive seulement a la mobilite de porteurs. L'energie d'activation decroǐt avec l'accroissement de l'humidite reflectant peut-ětre la mesure de completion des reseaux des liaisons hydrogenes." @default.
- W2023482147 created "2016-06-24" @default.
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- W2023482147 date "1990-08-16" @default.
- W2023482147 modified "2023-09-27" @default.
- W2023482147 title "Study of Protonic Diffusion in H4.5UO2(IO6)1.3 ·m H2O Using PFG NMR Method" @default.
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- W2023482147 doi "https://doi.org/10.1002/pssa.2211200210" @default.
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