论文信息 - Raman study of the phase transitions in Na(H1-xDx)3(SeO3)2

Raman study of the phase transitions in Na(H1-xDx)3(SeO3)2

The solid phases of Na(H1 - xDx)3(SeO3)2 were studied using Raman scattering. Samples with x = 0, 0.1, 0.3 and 0.75 were examined between room temperature and -185°C. Spectra were recorded over the 30 to 900 cm-1 range. The results suggest that the hydrogen atoms are disordered in phase I and ordered in phases III, III', and III''. The lack of splitting of the v4' mode of the SeO32- ion in phase II suggests that phase II is less ordered than phases III and III'. Other changes in split tings from phase to phase are consistent with changes in crystal symmetry. The results do not reflect strong changes in the strength of the hydrogen bonds with change of phase.

R. Knispel | B. Torrie

[1] Y. Makita,et al. Thermal Expansion in Na(H1-xDx)3(SeO3)2 and Isotope Effect , 1970 .

[2] B. Morosin,et al. Neutron diffraction study on paraelectric NaH3(SeO3)2 , 1970 .

[3] G. Soda,et al. Hydrogen-Bond Network and Ferroelectric Transition in Sodium Trihydrogen Selenite, NaD3(SeO3)2 by Nuclear Magnetic Resonance Study , 1969 .

[4] R. Blinc,et al. Nuclear-Magnetic-Resonance Study of the Ferroelectric Transitions in NaH3(SeO3)2and NaD3(SeO3)2 , 1968 .

[5] 島内みどり,et al. G. Herzberg: Molecular Spectra and Molecular Structure. III. Electronic Spectra and Electronic Structure of Polyatomic Molecules, D. Van Nostrand, Prinston 1966, 745頁, 16.5×24cm, 8,000円. , 1968 .

[6] T. C. Damen,et al. Temperature Dependence of the Ferroelectric Mode in KH2PO4 , 1968 .

[7] J. C. Decius,et al. Infrared‐Absorption Spectrum and Ferroelectric Behavior of Sodium Trihydroselenite , 1965 .

[8] E. A. Uehling,et al. Random Motion of Deuterons in KD2PO4 , 1962 .

[9] G. Walrafen. Raman Spectral Studies of Aqueous Solutions of Selenious Acid , 1962 .

[10] A. Simon,et al. Untersuchungen an Selen—Sauerstoff‐Verbindungen. I. Die Struktur der selenigen Säure , 1959 .