Synthesis and crystal structure of a novel ternary oxoborate, PbBiBO4

A novel ternary borate oxide, lead bismuth boron tetraoxide, PbBiBO4, has been prepared by solid-state reaction at temperature below 800 °C. The single-crystal X-ray structural analysis showed that PbBiBO4 crystallizes in the monoclinic space group P21/n with a=7.473(1)Å, b=7.517(1)Å, c=7.609(1)Å, β=91.48(1)β=91.48(1), Z=4Z=4. It represents a new structure type in which distorted BiO69− octahedra are connected to each other in corner- and edge-sharing manner to form two-dimensional ∞2[BiO4]5- layers that are bridged by B atoms of BO3 triangles giving rise to a three-dimensional ∞3[BiBO4]2- framework, with channels parallel to the [0 1 0] direction accommodating the pyramidally coordinated Pb2+ cations.

Graphical AbstractPbBiBO4 represents a new structure type in which ∞2[BiO4]5- layers are bridged by B atoms of BO3 triangles to give rise to a three-dimensional framework. Channels parallel to the [0 1 0] direction accommodate Pb2+ cations.Figure optionsDownload as PowerPoint slide