| Summary: | Nanocrystalline compounds LiNb<sub>1−<i>x</i></sub>Ta<i><sub>x</sub></i>O<sub>3</sub> of various compositions (<i>x</i> = 0, 0.25, 0.5, 0.75, 1) were synthesized by high-energy ball milling of the initial materials (Li<sub>2</sub>CO<sub>3</sub>, Nb<sub>2</sub>O<sub>5</sub>, Ta<sub>2</sub>O<sub>5</sub>) and subsequent high-temperature annealing of the resulting powders. Data on the phase composition of the nanopowders were obtained by X-ray diffraction methods, and the dependence of the structural parameters of LiNb<sub>1−<i>x</i></sub>Ta<i><sub>x</sub></i>O<sub>3</sub> compounds on the value of x was established. As a result of the experiments, the optimal parameters of the milling and annealing runs were determined, which made it possible to obtain single-phase compounds. The Raman scattering spectra of LiNb<sub>1−<i>x</i></sub>Ta<i><sub>x</sub></i>O<sub>3</sub> compounds (<i>x</i> = 0, 0.25, 0.5, 0.75, 1) have been investigated. Preliminary experiments have been carried out to study the temperature dependences of their electrical conductivity.
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