Unusual behaviour of non-stoichiometric cuprous selenide at the transition to the superionic phase
- 20 August 1980
- journal article
- Published by Taylor & Francis in Philosophical Magazine Part B
- Vol. 42 (2) , 287-296
- https://doi.org/10.1080/01418638008227286
Abstract
Differential thermal analysis on a series of non-stoichiometric samples of cuprous selenide Cu2–δSe has been performed. An unusual behaviour, unlike that in other well-known superionic conductors was found, the phase transition of the main rigid lattice, to the phase which characterizes most superionic conductors, takes place at a temperature 30–40 K above the second-order transition of the cation subsystem. This temperature difference is almost concentration independent. The results are discussed in terms of thermal-capacity data and compared with other experimental findings in this temperature range.Keywords
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