Ilyinsky A. V.1, Shadrin E. B.1
1Ioffe Institute, St. Petersburg, Russia
Email: shadr.solid@mail.ioffe.ru
The electronic configuration of chemical bonds between ions forming the structure of the AgI superionics existing in three different crystal modifications is discussed α-, β- and γ-phases.On the basis of the formulated schemes of hybridization of ion orbitals, the structural phase transitions γ->β and β->α occurring with increasing temperature are considered.It is shown that in the high-temperature superionic α-phase of the AgI crystal in an external electric field, along with an increase in electronic conductivity, hopping conductivity occurs due to a weakening of the coordination bonds between the ions of the substance and the jumps of silver ions along the ion-conducting channels. Keywords: phase transition, semiconductor, superionics, AgI, hybridization.
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