X-Ray Debye Temperatures of Zinc Sulfide and Zinc Telluride

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Abstract
The x‐ray Debye temperatures ΘM of zinc sulfide and zinc telluride have been determined to be 277 ± 7°K and 180 ± 6°K, respectively, by measurement of the temperature variation of the integrated intensities of Bragg reflections from powder specimens (method 1) in the temperature range 93–298°K. Only at the low end of the temperature range was Θm found to vary with temperature and Θm (93°K) appeared to be about 10% larger than the average values. The room‐temperature (298°K) Debye temperature for ZnTe was determined to be 175 ± 8°K from integrated intensities of selected Bragg peaks (method 2). Measured absolute structure amplitudes were used to calculate the root‐mean‐square vibrational amplitudes of the individual ions in ZnTe, which were found to be 0.094 ± 0.025 Å and 0.135 ± 0.030 Å for the Zn and Te ions, respectively. These results are discussed in relation to previous work on other materials.