Materials Data on TiPb9O11 by Materials Project

Abstract

TiPb9O11 crystallizes in the tetragonal P4 space group. The structure is two-dimensional and consists of one TiPb9O11 sheet oriented in the (0, 0, 1) direction. Ti4+ is bonded in a square pyramidal geometry to five O2- atoms. There is one shorter (1.76 Å) and four longer (2.00 Å) Ti–O bond length. There are three inequivalent Pb2+ sites. In the first Pb2+ site, Pb2+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Pb–O bond distances ranging from 2.32–2.41 Å. In the second Pb2+ site, Pb2+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Pb–O bond distances ranging from 2.36–2.95 Å. In the third Pb2+ site, Pb2+ is bonded in a 4-coordinate geometry to four equivalent O2- atoms. All Pb–O bond lengths are 2.35 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to one Ti4+ and three Pb2+ atoms. In the second O2- site, O2- is bonded to four Pb2+ atoms to form a mixture of corner and edge-sharing OPb4 tetrahedra. In the third O2- site, O2- is bonded to four Pb2+ atoms to form a mixture of corner and edge-sharing OPb4 tetrahedra. In the fourth O2- site, O2- is bonded in a single-bond geometry to one Ti4+ and four equivalent Pb2+ atoms.