Non-centrosymmetric sodium borate: Crystal growth, characterization and properties on Na2B4O12H10

In this study, both solvent evaporation and hydrothermal methods were employed to grow hydrated sodium borate crystals using NaOH and H3BO3 as reagents, and transparent and colorless single-crystals were successfully obtained with sizes up to 12 × 6 × 6 mm3 and 6 × 5 × 4 mm3, respectively. The structure is determined by single-crystal X-ray diffraction techniques. The title compound crystallizes in the trigonal space group R32, with a = 11.1042(16) A, b = 11.1042(16) A, c = 21.131(4) A, Z = 9 and R1 = 0.0322, wR2 = 0.0840. Infrared and transmission spectra are presented for the reported material. The powder second-harmonic generation (SHG) intensity measured by the Kurtz-Perry method indicates that the SHG effect of Na2B4O12H10 is about one-third times that of KH2PO4 (KDP).