Published August 1988
| Version v1
Journal article
Investigation of ammonium sites in NH4NbWo6/ND4NbWO6-ceramics by neutron powder diffraction
Creators
- 1. Erlangen-Nuernberg Univ., Erlangen (Germany, F.R.). Lehrstuhl fuer Werkstoffwissenschaften 3
Description
High resolution neutron powder diffraction data of NH/sub 4/NbWO/sub 6/ - space group Fd3m, collected in the temperature range between 300 K and 523 K, were analysed by Rietveld refinement. The results of these refinements showed that the ammonium ions occupy 8b positions (site symmetry 43m). The hydrogens are aligned towards the nearest oxygens, indicating the possibility of weak hydrogen bonding between the ammonium group and the framework. The data are likely to suggest a Grotthus-type of proton conduction mechanism, similar to NH/sub 4/TaWO/sub 6/, which we reported previously
Additional details
Publishing Information
- Journal Title
- Solid State Ionics
- Journal Volume
- 27
- Journal Issue
- 4
- Series
- Solid State Ionics.
- Journal Page Range
- 211-220
- ISSN
- 0167-2738
- CODEN
- SSIOD
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- Netherlands
- INIS RN
- 20053793
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
- Descriptors DEI
- AMMONIUM COMPOUNDS; CERAMICS; NEUTRON DIFFRACTION; NIOBIUM COMPOUNDS; TUNGSTEN OXIDES
- Descriptors DEC
- CHALCOGENIDES; COHERENT SCATTERING; DIFFRACTION; OXIDES; OXYGEN COMPOUNDS; SCATTERING; TRANSITION ELEMENT COMPOUNDS; TUNGSTEN COMPOUNDS
Optional Information
- Notes
- 10 refs.; 6 figs.; 4 tabs.