Preparation and structure of Nd2Sr1.5Ce0.5Cu2O6BO3: a 1222 phase containing a borate group as a connecting element

Abstract

Single-phase samples of Nd₂Sr_1.5Ce_0.5Cu₂O₆BO₃ have been prepared by optimizing compositions and sintring temperatures. The cell parameters a= 3.8974(1)Å and c= 26.6493(3)Å have been obtained from indexing the X-ray diffraction (XRD) patterns of the samples. The structure refined from the XRD pattern showed that the compound belongs to the 1222 family of layered cuprates. The BO₃ anion groups, acting as the connecting elements, occupy completely the sites between the CuO₂ layers in the structure.