Far-infrared and incoherent neutron scattering experiments of the solid electrolyte (C5H5NH)Ag5I6
- 28 October 1977
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 10 (20) , 4023-4031
- https://doi.org/10.1088/0022-3719/10/20/010
Abstract
Pyridinium pentasilver-hexaiodide, (C5H5NH)Ag5I6, is a solid electrolyte with a very high conductivity of the Ag+ ions, comparable to those of the best ionic conductors such as AgI and RbAg5I6. Far-infrared experiments (FIR) show the existence of very low frequency optical modes with h(cross) omega approximately=2-3 meV. The lack of structure in the incoherent neutron scattering experiments in this energy range strongly suggests that these low frequency modes are of prime importance for the conduction mechanism: the low frequency z polarised mode can be regarded as a 'quasi-attempt' mode for jumps of Ag+ ions from 4c-sites into adjacent empty 4c-sites along channels formed by face-sharing iodide octahedra.Keywords
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