Study of the structure of PyHReO{sub 4} under high pressure
- Joint Institute for Nuclear Research (Russian Federation)
- Mickiewicz University (Poland)
- Russian Research Centre 'Kurchatov Institute' (Russian Federation)
- HASYLAB am DESY (Germany)
The structure of deuterated pyridinium perrhenate (d{sub 5}PyH)ReO{sub 4} (C{sub 5}D{sub 5}NHReO{sub 4}) is studied by X-ray diffraction at room temperature and pressures up to 3.5 GPa and by neutron diffraction in the temperature range 10-293 K and at pressures up to 2.0 GPa. Under normal conditions, this compound belongs to the orthorhombic space group Cmc2{sub 1} (ferroelectric phase II). At room temperature and pressures above P > 0.7 GPa, a transition to an orthorhombic phase (paraelectric phase II) is observed. This paraelectric phase is described by the space group Cmcm. At a pressure as high as P = 2.0 GPa, phase I remains stable at temperatures down to 10 K. This fact indicates that the high pressure suppresses the ferroelectric state in deuterated pyridinium perrhenate (d{sub 5}PyH)ReO{sub 4}.
- OSTI ID:
- 21090918
- Journal Information:
- Crystallography Reports, Journal Name: Crystallography Reports Journal Issue: 3 Vol. 52; ISSN 1063-7745; ISSN CYSTE3
- Country of Publication:
- United States
- Language:
- English
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