Abstract

ABSTRACT: Anew nonlinear optical crystal, Na3VO2B6O11, has been grown by the top-seeded solution growthmethod using a Na2CO3-V2O5 flux. The structure of the compound was determined by single-crystal X-ray diffraction. It crystallizes in the noncentrosymmetric orthorhombic system, space groupP212121, with cell parameters a=7.7359(9) Å, b=10.1884(12) Å, c= 12.5697(15) Å, V = 990.7(2) Å3, and Z = 4. Na3VO2B6O11 has a three-dimensional structure consisting of hexaborate groups connected by VO4 tetrahedra with the sodium atoms distributed in channels through out the three-dimensional network. The refractive indices have beenmeasured by the minimum deviation technique and fit to the Sellmeier equations. Nonlinear optical measurements on the compound demonstrate that the material has second harmonic generation properties, with an efficiency approximately the same as that of KH2PO4.