Compositional Deformations, Absorption Spectroscopy, and Low-Temperature X-Ray Diffraction of Sr1 – xBaxBi2B2O7 Solid Solutions

Abstract

Thermal expansion of SrBi₂B₂O₇ borate was investigated by in situ powder X-ray diffraction in the temperature range from –175 to 25°C. Compositional deformations of Sr_1 – xBa_xBi₂B₂O₇ solid solutions were calculated. The band gaps for solid solutions were determined by the absorption spectroscopy. A similarity of thermal and compositional deformations has been established. These deformations were compared with the crystal structure of Sr_1 – xBa_xBi₂B₂O₇ solid solutions.