Тип публикации: статья из журнала
Год издания: 2017
Идентификатор DOI: 10.1134/S1063783417050250
Аннотация: The thermal, optical, and dielectric properties of fluoride Rb2TaF7 were investigated. It was observed that the variation in chemical pressure in fluorides A2 +TaF7 caused by the cation substitution of rubidium for ammonium does not affect the ferroelastic nature of structural distortions, but leads to stabilization of the high- and low-temperature phases and enhancement of birefringence. The entropy of the phase transition P4/nmm ↔ Cmma is typical of the shift transformations, which is consistent with a model of the initial and distorted phase structures. The anisotropy of chemical pressure causes the change of signs of the anomalous strain and baric coefficient dT/dp of Rb2TaF7 as compared with the values for its ammonium analog.
Издание
Журнал: Physics of the Solid State
Выпуск журнала: Т. 59, № 5
Номера страниц: 986-991
ISSN журнала: 10637834
Место издания: Санкт-Петербург
Издатель: Pleiades Publishing, Ltd. (Плеадес Паблишинг, Лтд)
Персоны
- Pogorel'tsev E.I. (Siberian Federal University)
- Mel'nikova S.V. (Kirensky Institute of Physics,Federal Research Center,Siberian Branch,Russian Academy of Sciences)
- Kartashev A.V. (Krasnoyarsk State Pedagogical University)
- Gorev M.V. (Siberian Federal University)
- Flerov I.N. (Siberian Federal University)
- Laptash N.M. (Institute of Chemistry,Far East Branch,Russian Academy of Sciences)
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