Zirconium

Table 1. Zr 3d5/2 biinding energies [1]

Native oxide = 182.3 eV, underlying metal 179.0 eV. [2]

3d splitting = 2.43 eV [3]

References:
1) http:/srdata.nist.gov/xps/
2) M.C. Biesinger, unpublished results (2009)
3) J.F. Moulder, W.F. Stickle, P.E. Sobol, K.D. Bomben "Handbook of X-Ray Photoelectron Spectroscopy", Perkin-Elmer Corporation, Physical Electronics Division, Eden Prairie, Minn. (1992)