Materials Data on Pb3Se2(BrO3)2 by Materials Project
Pb3(SeO3)2Br2 crystallizes in the monoclinic C2/c space group. The structure is two-dimensional and consists of eight hydrobromic acid molecules and two Pb3(SeO3)2 sheets oriented in the (0, 0, 1) direction. In each Pb3(SeO3)2 sheet, there are two inequivalent Pb2+ sites. In the first Pb2+ site, Pb2+ is bonded in a distorted hexagonal planar geometry to six O2- atoms. There are a spread of Pb–O bond distances ranging from 2.63–2.79 Å. In the second Pb2+ site, Pb2+ is bonded in a distorted pentagonal planar geometry to five O2- atoms. There are a spread of Pb–O bond distances ranging from 2.53–2.74 Å. Se2- is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.69–1.78 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to three Pb2+ and one Se2- atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to two Pb2+ and one Se2- atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to three Pb2+ and one Se2- atom.