The crystal structure of CuSb2O3Br: Slabs from cubic Sb2O3 interspersed between puckered hexagonal CuBr-type layers

The new compound CuSb2O3Br crystallize in the monoclinic space group Cc  . The unit cell parameters are a=7.9189(15)Å, b=13.7105(10)Å, c=19.048(2)Å, β=90°β=90°, Z=16Z=16. The crystal structure is solved from single crystal data, R=0.0490R=0.0490. The compound show a layered structure with slabs from cubic Sb2O3 interspersed in between puckered layers of CuBr. The Sb(III) atoms have tetrahedral [SbO3E] coordination where E is the 5s2 lone pair, these units build up Sb4O4E6 cages. The CuBr layers resemble those in hexagonal CuBr but the Cu(I) ions have actually tetrahedral [CuBr3O] coordination. The Cu–O bonds link the Sb4O6 cages with the CuBr layers.

The compound CuSb2O3Br is described. The layers consist of Sb4O6 cages resembling those in cubic Sb2O3 interspersed between puckered CuBr layers that bear similarities to the layers in hexagonal CuBr. Cu–O bonds link the Sb4O6 cages with CuBr.Figure optionsDownload as PowerPoint slide