Synthesis and structure of the bilayer hydrate Na0.3NiO2.1.3D2O.

The metal oxide bilayer deuterate (hydrate) Na(0.3)NiO2.1.3D2O (Na(0.3)NiO2.1.3H2O) were prepared from NaxNiO2 by extracting Na+ cations and simultaneously intercalating fully and nondeuterated water. High-resolution neutron powder diffraction, thermogravimetric analysis, and inductively coupled plasma atomic emission spectroscopy were used to show that a Na(0.3)(D2O)(1.3) network separates layers of edge-sharing NiO6 octahedra.