Raman spectra of silver-halide melts and sublattice melting in the superionic conductor
- 15 August 1977
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 16 (4) , 1410-1415
- https://doi.org/10.1103/physrevb.16.1410
Abstract
We have measured the Raman spectra of AgBr and AgCl in both the high-temperature solid and the melt. The melt spectra are strikingly similar to the spectrum of the superionic conductor . We have found that second-order Raman scattering from short-wavelength vibrations ("zone-boundary" phonons) is the primary scattering mechanism for the melts. The spectrum coincides with the silver-halide melt spectra when frequency is scaled by inverse square root of the halide mass ratio. We believe that the spectrum is also due mainly to the second-order processes and is affected by the molten cation sublattice. We find no evidence for a direct connection between the cation motion in and the Raman spectrum.
Keywords
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