Temperature hysteresis and latent heat with a phase transition at 208 K in the superionic conductor RbAg4I5
Goffman V. G. , Gur'yanov A. A. , Zakharchenya B. P. , Chudnovskii F. A.
The temperature dependence of the heat capacity of RbAg4I5 single crystals near a phase transition at 208 К is investigated. In this transition the heat capacity and optical properties of the crystal exhibit hysteresis and the transition is accompanied by liberation of latent heat (70 cal/mole). On the basis of these results, it is concluded that the phase transition at 208 К in RbAg4I5 is a first-order transition.