Single crystal of lithium iodate (Z-cut samples) were implanted at roo
m temperature with Eu+ ions at 150 kev with a fluence of 5.10(16) ions
.cm(-2). The oxidation states of the cations have been determined by X
-ray photoelectron spectroscopy (XPS). XPS spectra clearly reveal only
europium in Eu3+ along the depth profile analysis.