Amorphous and nonstoichiometric solid solution systems based on lithium niobates and tantalates: Solid-state NMR studies of local structure and dynamics

erroelectric lithium niobate ;Cation mobility and spatial distribution of Li ions for the solid solution ;The crystallization of amorphous oxides synthesized by pyrolytic decomposition of mixed Li and Ta 2-ethylhexanoates and alkoxides was investigated. The study was motivated by thermodynamic considerations that, in the light of experience in other systems, suggest the potential for metastable extension of the...