Raman study of the phase transition in RbHSO 4
Raman spectra of RbHSO 4 have been recorded in the temperature range from 6 K to the melting point, 480 K. Analysis of the spectra show that the second order phase transition, at 264 K, Is of the order‐disorder type. No soft mode was found. The evolution of the ν(OH) mode frequency with temperature...
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| Veröffentlicht in: | Journal of Raman spectroscopy 1981-04, Vol.11 (2), p.81-91 |
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| container_title | Journal of Raman spectroscopy |
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| creator | Toupry, N. Poulet, H. Le Postollec, M. |
| description | Raman spectra of RbHSO
4
have been recorded in the temperature range from 6 K to the melting point, 480 K. Analysis of the spectra show that the second order phase transition, at 264 K, Is of the order‐disorder type. No soft mode was found. The evolution of the ν(OH) mode frequency with temperature, is consistent with a change of orientation of the hydrogen bonds connecting the disordered SO
3
O(H) groups. The spectra are also consistent with the existence of a prototype phase which had been assumed to explain the pseudo‐orthorhombic symmetry of the paraelectric and ferroelectric phases. |
| doi_str_mv | 10.1002/jrs.1250110207 |
| format | Article |
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4
have been recorded in the temperature range from 6 K to the melting point, 480 K. Analysis of the spectra show that the second order phase transition, at 264 K, Is of the order‐disorder type. No soft mode was found. The evolution of the ν(OH) mode frequency with temperature, is consistent with a change of orientation of the hydrogen bonds connecting the disordered SO
3
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have been recorded in the temperature range from 6 K to the melting point, 480 K. Analysis of the spectra show that the second order phase transition, at 264 K, Is of the order‐disorder type. No soft mode was found. The evolution of the ν(OH) mode frequency with temperature, is consistent with a change of orientation of the hydrogen bonds connecting the disordered SO
3
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4
have been recorded in the temperature range from 6 K to the melting point, 480 K. Analysis of the spectra show that the second order phase transition, at 264 K, Is of the order‐disorder type. No soft mode was found. The evolution of the ν(OH) mode frequency with temperature, is consistent with a change of orientation of the hydrogen bonds connecting the disordered SO
3
O(H) groups. The spectra are also consistent with the existence of a prototype phase which had been assumed to explain the pseudo‐orthorhombic symmetry of the paraelectric and ferroelectric phases.</abstract><doi>10.1002/jrs.1250110207</doi><tpages>11</tpages></addata></record> |
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| ispartof | Journal of Raman spectroscopy, 1981-04, Vol.11 (2), p.81-91 |
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| language | eng |
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| title | Raman study of the phase transition in RbHSO 4 |
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