Synthesis, structure and properties of Pb2Bi2AlB3O11

Abstract: Single crystals of Pb2Bi2AlB3O11 were grown from a PbO/Bi2O3/Al2O3/H3BO3/PbF2 flux. The single-crystal X-ray structural analysis showed that Pb2Bi2AlB3O11 crystallizes in the monoclinic space group C2/c (No. 15) with a =17.263(2)Å, b =8.7322(11)Å, c =6.8081(9)Å, α =90°, β =90.566(2)°, γ =90°, Z =4 and R 1 =0.0393, wR 2 =0.1013. Its structure may be described as three-dimensional frameworks formed of (100) [Pb6Bi6Al3O6]∞ layers stacked along a-axis. The layers are interconnected via BO3 groups. The IR spectrum further confirmed the presence of BO3 groups in the structure. The thermal analysis suggests that Pb2Bi2AlB3O11 is a congruently melting compound. [Copyright &y& Elsevier]