Neutron and high-pressure X-ray diffraction study of hydrogen-bonded ferroelectric rubidium hydrogen sulfate
No Thumbnail Available
Date
2016-01-01
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
International Union of Crystallography
Abstract
The pressure- and temperature-dependent phase transitions in the ferroelectric material rubidium hydrogen sulfate (RbHSO4) are investigated by a combination of neutron Laue diffraction and high-pressure X-ray diffraction. The observation of disordered O-atom positions in the hydrogen sulfate anions is in agreement with previous spectroscopic measurements in the literature. Contrary to the mechanism observed in other hydrogen-bonded ferroelectric materials, H-atom positions are well defined and ordered in the paraelectric phase. Under applied pressure RbHSO4 undergoes a ferroelectric transition before transforming to a third, high-pressure phase. The symmetry of this phase is revised to the centrosymmetric space group P21/c, resulting in the suppression of ferroelectricity at high pressure. © International Union of Crystallography
Description
Keywords
Neutron diffraction, Phase transformations, Ferromagnetism, X-ray diffraction, Pressure range mega pa 10-100, Temperature dependence, Laue method, Rubidium compounds
Citation
Binns, J., McIntyre, G. J., & Parsons, S. (2016). Neutron and high-pressure X-ray diffraction study of hydrogen-bonded ferroelectric rubidium hydrogen sulfate. Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials, B72(Part 6), 855-863. doi:10.1107/S2052520616013494