Тип публикации: статья из журнала
Год издания: 2013
Идентификатор DOI: 10.1016/j.jfluchem.2013.07.001
Ключевые слова: Cubic fluorides, Phase transitions, Entropy, Thermal dilatation, Permittivity, Pressure effect
Аннотация: The heat capacity, thermal dilatation, permittivity, and T-p phase diagram of (NH4)(3)ZrF7 have been studied in wide temperature and pressure ranges. Two phase transitions were found in addition to previously known structural transformations. The stability of crystal phases to temperature and pressure has been examined and a possibПоказать полностьюility of transition between two cubic phases has been discussed. The total excess entropy change Sigma Delta S-i = RIn6 is characteristic for the order-disorder processes, but its stepwise increase is not consistent with the structural model associated with the strong disorder assumed in the initial cubic phase. (C) 2013 Elsevier B.V. All rights reserved.
Журнал: JOURNAL OF FLUORINE CHEMISTRY
Выпуск журнала: Vol. 154
Номера страниц: 1-6
ISSN журнала: 00221139
Место издания: LAUSANNE
Издатель: ELSEVIER SCIENCE SA