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Neutron and high-pressure X-ray diffraction study of hydrogen-bonded ferroelectric rubidium hydrogen sulfate.
- Source :
-
Acta Crystallographica Section B: Structural Science, Crystal Engineering & Materials . Dec2016, Vol. 72 Issue 6, p855-863. 9p. - Publication Year :
- 2016
-
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. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SULFURIC acid
*PHASE transitions
*X-ray diffraction
Subjects
Details
- Language :
- English
- ISSN :
- 20525192
- Volume :
- 72
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Acta Crystallographica Section B: Structural Science, Crystal Engineering & Materials
- Publication Type :
- Academic Journal
- Accession number :
- 120075236
- Full Text :
- https://doi.org/10.1107/S2052520616013494