Abstract
The infrared and Raman intensities can be related to the order parameter close to order-disorder phase transitions in crystal systems. In the present study this relationship has been obtained and compared with our experimental results for ammonium halides.
Our predictions give satisfactory agreement with the observations in these crystals.
It is proposed that the FTIR techniques can be appropriately used to evaluating the order parameter in various crystal systems.
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References
H. Yurtseven, W. F. Sherman, Disorder-Induced Raman Scattering in Ammonium Halides (in preparation).
C. H. Wang, R. B. Wright,J. Chem. Phys. 1972,56, 2124.
J. M. Loveluck, J. B. Sokoloff,J. Phys. Chem. Solids 1973,34, 869.
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Yurtseven, H., Sherman, W.F. Spectroscopic intensities as measures of order parameter close to order-disorder transitions. Mikrochim Acta 94, 125–127 (1988). https://doi.org/10.1007/BF01205853
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DOI: https://doi.org/10.1007/BF01205853