Temperature-dependent structure of an intermetallic ErPd2Si2 single crystal: A combined synchrotron and in-house X-ray diffraction study
Abstract
We have grown intermetallic ErPd2Si2 single crystals employing laser-diodes with the floating-zone method. The temperature-dependent crystallography was determined using synchrotron and in-house X-ray powder diffraction measurements from 20 to 500 K. The diffraction patterns fit well with the tetragonal I4/mmm space group (No. 139) with two chemical formulas within one unit cell. Our synchrotron X-ray powder diffraction study shows that the refined lattice constants are a = 4.10320(2) , c = 9.88393(5) at 298 K and a = 4.11737(2) , c = 9.88143(5) at 500 K, resulting in the unit-cell volume V = 166.408(1) 3 (298 K) and 167.517(2) 3 (500 K). In the whole studied temperature range, we did not find any structural phase transition. Upon cooling, the lattice constants a and c are shortened and elongated, respectively.
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