Raman measurements of the mobile cation vibrations in Na, K, Ag and Li. beta. ''-alumina
Conference
·
OSTI ID:5945572
Polarized Raman measurements have been made for single crystals of Na, K, Ag and Li ..beta..''-alumina. For each material, the modes due principally to the mobile cations have been identified. The number and symmetry of the observed modes can best be explained by considering the local ordering of the cations as a two-dimensional superlattice. Raman spectra for a number of Na ..beta..''-alumina samples with different growth temperatures, compositions, and degrees of hydration were carefully compared. Several of the observed differences in the Raman intensities can be attributed to the effects of either composition or short-range superlattice ordering. A Raman mode which is a likely candidate for the attempt mode for diffusion has been identified for the Na, K and Ag crystals.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5945572
- Report Number(s):
- CONF-830708-6; ON: DE83015697
- Country of Publication:
- United States
- Language:
- English
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