A new polymorph of Cd3B2O6: synthesis, crystal structure and phase transformation

Abstract

A new polymorph of Cd₃B₂O₆ (β-Cd₃B₂O₆) has been grown through spontaneous crystallization with the flux system. β-Cd₃B₂O₆ crystallizes in triclinic space group P and features a three-dimensional Cd–O network composed of CdO_n (n = 5, 6) distorted polyhedra and isolated planar BO₃ groups. The phase transformation of Cd₃B₂O₆ has been studied by the structure analysis and powder X-ray diffraction. TG-DSC measurement reveals the melting behavior and phase transformation temperature. Furthermore, the IR spectrum was measured. The detailed structure comparison between Cd₃B₂O₆ and other cadmium-containing borates, such as CdB₄O₇, CdB₂O₄ and Cd₂B₂O₅ was also carried out.