Abstract
Abstract Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy has been used to study the lattice site of impurities in lithium niobate single crystals. The determination of the distances from the impurity to the first oxygen coordination sphere and to the niobium neighbours gives the lattice site of the impurity and its displacement along the c-axis of the lattice. In this way, it has been determined the position of transition metal (Ni2+, Fe3+, Ti4+, Hf4+ and Ta5+) and rare-earth (Er3+, Nd3+) impurities.
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