Built by putting Zr on the U site of UFe5Si3 (Materials Project mp-580439, CC-BY-4.0) and relaxed with Orb v3 on Ouro. A candidate structure for the hard magnetic Zr-Fe-Si phase reported by Yamamoto et al. (doi:10.1016/j.jallcom.2021.162664), whose structure is unassigned. 26.0 meV/atom above the Orb hull and +15.9 meV/atom in PBE single points; not yet compared with the measured diffraction pattern.