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VOLUME 58 (1993) | ISSUE 6 | PAGE 421
Site-planar effect in oxygen isotope exchange in the YBa2Cu3O7-δ system
Oxygen isotope exchange between a gas phase and Á õ÷Á2óÉ307_Ê crystal can pass through several stages. This effect is observed during isochronous annealings of a sample. It stems from the presence of sites and planes of different types in the crystal lattice. The site-planar effect observed here might be utilized to study the mechanism for the diffusion of oxygen atoms and also to synthesize crystals with given isotope compositions in the various sites of the oxygen sublattice.