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) {\AA}, c = 9.88393(5) {\AA} at 298 K and a = 4.11737(2) {\AA}, c = 9.88143(5) {\AA} at 500 K, resulting in the unit-cell volume V = 166.408(1) {\AA}3 (298 K) and 167.517(2) {\AA}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.
@article{arxiv.2203.16212,
title = {Temperature-dependent structure of an intermetallic ErPd$_2$Si$_2$ single crystal: A combined synchrotron and in-house X-ray diffraction study},
author = {Kaitong Sun and Yinghao Zhu and Si Wu and Junchao Xia and Pengfei Zhou and Qian Zhao and Chongde Cao and Hai-Feng Li},
journal= {arXiv preprint arXiv:2203.16212},
year = {2022}
}