Moessbauer diffraction in the superionic conductor RbAg4I5

The problem of Moessbauer diffraction on crystals with intensive diffusion is analysed for the case of the superionic conductor RbAg4I5. An expression for the Moessbauer spectra of the diffracted beam is given for different diffusional modes. The experimental temperature dependence of the coherent scattering of Moessbauer radiation in this sample is interpreted on the basis of developed theoretical assumptions. (author)