论文信息 - Comment on “Does the structural superionic phase transition at 231 °C in CsH2PO4 really not exist?” [J. Chem. Phys. 110, 4847 (1999)]

Comment on “Does the structural superionic phase transition at 231 °C in CsH2PO4 really not exist?” [J. Chem. Phys. 110, 4847 (1999)]

Single crystal and powder diffraction investigations have revealed that the paraelectric phase of cesium dihydrogen phosphate, CsH2PO4 (CDP), from the crystallographic point of view is stable (space group P21/m) up to ca. 231 °C. At this temperature a structural phase transition from the paraelectric phase to the superionic phase (space group Pm–3m) has been observed. The superionic phase of CDP is unstable under normal air condition due to dehydration process. Under H2O-saturated atmosphere the superionic phase transition of CDP takes place without decomposition and is reversible with a temperature hysteresis on cooling.

W. Bronowska

[1] B. Mellander,et al. On the high-temperature phase transitions of CsH2PO4: A polymorphic transition? A transition to a superprotonic conducting phase? , 1999 .

[2] Kwang-Sei Lee,et al. Hidden nature of the high-temperature phase transitions in crystals of KH2PO4-TYPE : Is it a physical change ? , 1996 .

[3] A. Preisinger,et al. The Phase Transition of CsH2PO4 (CDP) at 505 K , 1994 .

[4] R. Vargas,et al. Phase behaviour of RbH2PO4 and CsH2PO4 in the fast-ion regime , 1993 .

[5] F. Romain,et al. Raman study of the high-temperature phase transition in CsH2PO4 , 1991 .

[6] W. Bronowska,et al. X-ray study of the high-temperature phase transition of CsH2PO4 crystals , 1990 .

[7] A. I. Baranov,et al. High temperature phase transitions and proton conductivity in some KDP-family crystals , 1989 .

[8] A. I. Baranov,et al. Frequency dielectric dispersion in the ferroelectric and superionic phases of CsH2PO4 , 1988 .

[9] A. Lundén,et al. Notizen: New Phase Transitions in CsHSeO4, CsH2PO4, RbHSO4, RbHSeO4, and RbH2PO4 , 1986 .

[10] L. C. Gupta,et al. Thermal stability of CsH2PO4 , 1980 .

[11] Y. Ishibashi,et al. Some High-Temperature Properties and the Raman Scattering Spectra of CsH 2 PO 4 , 1979 .

[12] J. Clark,et al. Differential scanning calorimetry of RbH2PO4 and CsH2PO4 , 1978 .

[13] P. W. Richter,et al. High-pressure phase relations of RbH2PO4, CsH2PO4, and KD2PO4 , 1978 .