X-ray absorption spectroscopy (XAS) measurements were performed at BM31 / Swiss Norwegian Beamlines (SNBL) at the European Synchrotron Radiation Facility (ESRF) in Grenoble, France. The Zr K-edge was measured from 17.9 to 19.0 keV (edge position at 17.9976 keV), and the energy calibration was achieved by recording the spectra of a Zr foil.