Published November 25, 1996
| Version v1
Journal article
Structure and proton conduction in pyrochlore-type antimonic acid. A neutron diffraction study
- 1. Department of Chemistry, University of Exeter, Exeter (United Kingdom)
- 2. Reactor Radiation Division, National Institute of Standards and Technology, Gaithersburg, MD (United States)
Description
The structure of pyrochlore-type antimonic acid, HSbO3·0.5H2O, has been investigated using powder diffraction of neutrons. The structure (space group Fd3m) contains an [Sb2O62-] framework, with interstitial oxygens present as a mixture of H2O and H3O+. Three H-atom sites have been identified, (1) close to the [Sb2O62-] framework in hydroxyl groups (Sb-OH), (2) H in water molecules H-bonded to framework hydroxyls, and (3) H in H3O+ ions H-bonded to O-atoms of the intercavity windows. An intraframework equilibrium of the type Sb-OH+H2O<->Sb-O-+H3O+ provides the mechanism for intracavity chemical exchange and proton conduction
Additional details
Publishing Information
- Journal Title
- Solid State Ionics
- Journal Volume
- 92
- Journal Issue
- 3-4
- Journal Page Range
- p. 171-181.
- ISSN
- 0167-2738
- CODEN
- SSIOD3
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- Netherlands
- INIS RN
- 28027623
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ANIONS; ANTIMONY OXIDES; HYDROXIDES; INTERSTITIALS; NEUTRON DIFFRACTION; OXYGEN; STRUCTURE FACTORS
- Descriptors DEC
- ANTIMONY COMPOUNDS; CHALCOGENIDES; CHARGED PARTICLES; COHERENT SCATTERING; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; DIFFRACTION; ELEMENTS; HYDROGEN COMPOUNDS; IONS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; POINT DEFECTS; SCATTERING