FORMATION AND STRUCTURAL CHARACTERISTICS OF SOLID SOLUTIONS IN (1-X) (K0.5NA0.5)NBO3- X (NA0.5BI0.5)TIO3 Article Bronnikova S.I., Fortalnova E.A., Safronenko M.G., Politova E.D. Advances in synthesis and complexing. РУДН. 2019. 56 p.