Raman scattering from bismuth triborate

Abstract

Abstract Bismuth triborate, BiB 3 O 6 (BiBO), a promising new material for effective frequency conversion, was synthesized by top‐seeded growth from the nearly stoichiometric melt at high temperature. The crystal space group is non‐centrosymmetric monoclinic C 2 with Z = 2. The lattice constants were a = 7.116(2), b = 4.993(2) and c = 6.508(3) Å with β = 105.62(3)°. The atomic Wyckoff positions are Bi in 2 a , B(1) in 2 b and B(2) and O in 4 c . Raman spectra show that the structural rigidity of the BiBO crystals can be mainly ascribed to B—O bond stretching and bending. The B(1)O 4 units weaken the conjugated π‐orbit system. The BiBO crystal has a short ultraviolet absorption edge. Therefore, the two principal structural units, B(2)O 3 and B(1)O 4 , and the bonding are of considerable interest. Copyright © 2002 John Wiley & Sons, Ltd.