Peculiarities of transformations in systems of coordination nitrate precursors of rare earth elements and lithium during the formation of polyfunctional oxide materials

The article summarizes information important for practical use on the conditions of formation, composition, structure, forms of Ln coordination polyhedra, type of ligand coordination, and characteristic properties of lithium coordination nitrates of rare earth elements of the cerium subgroup of the isostructural series Li3[Ln2(NO3)9]∙3H2O (Ln – La–Nd) (predecessors of promising modern multifunctional materials). The obtained data (as primary information) can serve as the basis for identifying, monitoring the phase state of processing objects in the preparatory stages; selection of criteria for the compatibility of components in the formation of single-layer and layered nanostructured oxide systems of lanthanides and transition elements with the structure of defective perovskite, garnet in the form of powders, thick films, bulk ceramics; development of various combined methods of their activation and establishment of technologically functional dependencies; controlled modification of the properties of the target product; optimization of synthesis modes of lithium-conducting systems such as electrodes of rechargeable batteries, electrolyte membranes and sensors, elements and instrument structures of modern telecommunications systems.