A pair distribution function (PDF) analysis of temperature-dependent X-ray diffraction measurements from UCu4Pd is presented. Fits to the displacement parameters (u2's) with a Debye model show better agreement with a model that includes 25% of the Pd atoms on 16e (Cu) sites. In addition, significant non-thermal disorder is observed in the Cu environment, in contrast to previous measurements of local order in the U--Cu pairs.
PACS numbers: 72.15.Qm, 61.10.Ht, 71.23.--k, 71.27.+a
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