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- Title
Neutron and high-pressure X-ray diffraction study of hydrogen-bonded ferroelectric rubidium hydrogen sulfate.
- Authors
Binns, Jack; McIntyre, Garry J.; Parsons, Simon
- 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.
- Subjects
SULFURIC acid; PHASE transitions; X-ray diffraction
- Publication
Acta Crystallographica Section B: Structural Science, Crystal Engineering & Materials, 2016, Vol 72, Issue 6, p855
- ISSN
2052-5192
- Publication type
Article
- DOI
10.1107/S2052520616013494