| Institution: | 1. CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi, 830011 P.R. China;2. CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices, 40-1 South Beijing Road, Urumqi, 830011 P.R. China
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049 P.R. China;3. Xuchang Quality and Technical Supervision, Inspection and Testing Center, National Quality Supervision and Inspection Center for Ceramic Products of China, West Section of Longxing Road, Dongcheng District, Xuchang, 461000 P.R. China |
| Abstract: | Two new sodium aluminum borates, Na3AlB8O15 and Na3Al2B7O15, have been successfully synthesized by the high-temperature solution method. They crystallize in the different space groups, P21/c and P2/c, respectively. The B−O configurations of β-Na2B6O10, Na3AlB8O15 and Na3Al2B7O15 are compared to feature complicated different dimensional open-framework structures caused by the substitution of BO4] by AlO4] covalent tetrahedra. Moreover, the experimental results indicate that Na3AlB8O15 and Na3Al2B7O15 have short ultraviolet (UV) cutoff edges (<187 nm). The first-principles calculations show that Na3AlB8O15 and Na3Al2B7O15 have moderate birefringence (0.075 and 0.041@1064 nm, respectively). |
