Abstract
A layered perovskite compound with Na +, D 3O + ions (H 3O +) and D 2O molecules (H 2O) in the interlayer, D x Na 1− x LaTiO 4· yD 2O, has been prepared by an ion-exchange/intercalation reaction with dilute DCl solution, using an n = 1 Ruddlesden–Popper phase, NaLaTiO 4. Its structure has been analyzed in order to clarify the interlayer structure by Rietveld method, using powder neutron diffraction data. The structure analysis revealed that the layered structure changed from the space group P4/nmm– I4/mmm after the ion-exchange/intercalation reaction, and it induced the transformation of perovskite layers from staggered to an eclipsed configuration. The D 2O molecules and D 3O + ions loaded in the interlayer statistically occupied the sites around a body center position of rectangular space surrounded by eight apical O atoms of TiO 6 octahedra in upper and lower layers.
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