The measured phonon dispersion relations for PdD 0.63 at 150K are used to estimate the elastic constants and low-temperature Debye theta for this compound. The results explain the observations that the low-temperature lattice properties (e.g. specific heat, thermal expansion) of PdH x alloys for x approximately=0.6 are very similar to those for pure Pd.
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Jacob M. Rowe (1978) studied this question.
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