Ab initio structure determination of novel borate NaSrBO3 |
| |
Authors: | L. Wu X.L. Chen Y. Zhang J.J. Xu |
| |
Affiliation: | a The Key Laboratory of Advanced Technique and Fabrication for Weak-Light Nonlinear Photonics Materials, Ministry of Education, Nankai University, Tianjin 300457, PR China b Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, PR China |
| |
Abstract: | A novel orthoborate, NaSrBO3, has been successfully synthesized by standard solid-state reaction, and the crystal structure has been determined from powder X-ray diffraction data. It crystallizes in the monoclinic space group P21/c with lattice parameters: , , , β=100.589(1)°. The fundamental building units are isolated BO3 groups, which are parallelly distributed along two different directions. Because of the anisotropic polarizations of planar BO3 groups, a considerable birefringence can be expected in it. The Na atoms are six-coordinated with O atoms to form octahedra, and the Sr atoms are nine-coordinated, forming tri-capped trigonal prisms. Those polyhedra connect with each other by bridging-oxygen atoms, forming infinite three-dimensional network, which indicates that the cleaving problem is expected to be overcome during the course of single-crystal growth. The infrared spectrum has been measured, and the result is consistent with the crystallographic study. Moreover, a comparison of the new structure type with the other known orthoborates is presented here. |
| |
Keywords: | Borates Structure determination X-ray diffraction |
本文献已被 ScienceDirect 等数据库收录! |
|