Synthesis and Crystal Structure of a Novel Ternary Oxoborate, PbBiBO4.

Abstract 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 ) A , b = 7.517 ( 1 ) A , c = 7.609 ( 1 ) A , β = 91.48 ( 1 ) , Z = 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 [ BiO 4 ] 5 - layers that are bridged by B atoms of BO3 triangles giving rise to a three-dimensional ∞ 3 [ BiBO 4 ] 2 - framework, with channels parallel to the [0 1 0] direction accommodating the pyramidally coordinated Pb2+ cations.