A new non-centrosymmetry compound: Synthesis, crystal structure and electronic structure study of hydrated sodium borate Na2[BO2(OH)]·H2O

The material exhibits a three-dimensional structure consisting of interconnecting Na(1)O6 groups, Na(2)O7 units and isolated BO3 triangles. Two Na(1)O6 groups and two Na(2)O7 groups are connected by O atoms to form parallelogram-type structure viewed down the c-axis. And two Na(1)O6 groups are located on a pair of edges, which are parallel to each other, in parallelogram-type structure respectively and two Na(2)O7 groups are located in another pair of parallel edges severally.