High-Pressure Investigation of the Ferroelectric ND4IO3

DOI

We propose a high-pressure neutron powder diffraction study of the crystal structure of deuterated ammonium iodate, ND4IO3, which is known to undergo a ferroelectric phase transition at 368 K at ambient pressure. In addition to the covalent bonds within the IO3- and ND4+ ions, the secondary bonds consists of short O...I halogen bonds and N-H¿O hydrogen bonds. The proposed two-part experiment will collect high-quality neutron powder diffraction data at room-temperature up to 8 GPa and will also investigate the ferroelectric phase transition behaviour at 395 K for pressures up to 5 GPa. The main aims of this neutron study will be to: i) determine the structure pressure dependence of ammonium iodate at room temperature, ii) structurally characterise the ferroelectric transition region of p-T space, and iii) determine the structures of any previously unknown phases which we may encounter.

Identifier
DOI https://doi.org/10.5286/ISIS.E.63524388
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/63524388
Provenance
Creator Dr Kevin Knight; Dr Bill Marshall; Dr Craig Bull; Dr Richard Jones
Publisher ISIS Neutron and Muon Source
Publication Year 2018
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Chemistry; Natural Sciences; Physics
Temporal Coverage Begin 2015-09-10T09:00:00Z
Temporal Coverage End 2015-09-16T09:00:00Z