Proton motion in HNbO 3 and HTaO 3
Proton NMR relaxation times T 1, T 1 ϱ , and T 2 are reported for the compounds HTaO 3 and HNbO 3 in the temperature range 170–540 K. The data show that for both compounds two types of motion occur. Proton diffusion occurs in both compounds above 400 K with a correlation time, τ 0 c, of ∼30 ps and a...
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| Published in | Journal of solid state chemistry Vol. 60; no. 2; pp. 139 - 144 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier Inc
1985
|
| Online Access | Get full text |
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| Summary: | Proton NMR relaxation times
T
1,
T
1
ϱ
, and
T
2 are reported for the compounds HTaO
3 and HNbO
3 in the temperature range 170–540 K. The data show that for both compounds two types of motion occur. Proton diffusion occurs in both compounds above 400 K with a correlation time,
τ
0
c, of ∼30 ps and an activation energy of ∼50 kJ mole
−1, approximately twice that for the localized process occurring at lower temperatures. Alternating current conductivity measurements have been used to study proton diffusion above 470 K in these compounds. |
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| ISSN: | 0022-4596 1095-726X |
| DOI: | 10.1016/0022-4596(85)90105-7 |