Double borates of the BaO–Lu<sub>2</sub>O<sub>3</sub>–B<sub>2</sub>O<sub>3</sub> system: crystal chemistry, thermal and optical properties

The paper presents data on synthesis of double borates crystallizing in the BaO–Lu2O3–B2O3 system and Eu3+-activated phosphors based on them as well as on finding of correlations between its chemical composition, crystal structure, thermal and optical properties. Based on results of the investigation of all currently known double Ba–Lu borates, it is shown that search for novel compounds in the system as well as development of optical materials based on them is a promising direction in a field of creating new functional materials for LED applications.