ISIS Neutron and Muon Source Data Journal

High-Pressure Investigation of the Ferroelectric ND4IO3

Abstract: 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.

Principal Investigator: Dr Richard Jones
Experimenter: Dr Kevin Knight
Experimenter: Dr Bill Marshall
Experimenter: Dr Kevin Knight
Local Contact: Dr Craig Bull

DOI: 10.5286/ISIS.E.RB1510621

ISIS Experiment Number: RB1510621

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Richard Jones et al; (2015): High-Pressure Investigation of the Ferroelectric ND4IO3, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1510621

Data is released under the CC-BY-4.0 license.