Materials Data on Fe3Pb5F19 by Materials Project
Pb5Fe3F19 crystallizes in the tetragonal I4cm space group. The structure is three-dimensional. there are two inequivalent Fe3+ sites. In the first Fe3+ site, Fe3+ is bonded in an octahedral geometry to six F1- atoms. There are a spread of Fe–F bond distances ranging from 1.93–1.98 Å. In the second Fe3+ site, Fe3+ is bonded to six F1- atoms to form corner-sharing FeF6 octahedra. The corner-sharing octahedral tilt angles are 0°. There is five shorter (1.94 Å) and one longer (2.01 Å) Fe–F bond length. There are two inequivalent Pb2+ sites. In the first Pb2+ site, Pb2+ is bonded in a 7-coordinate geometry to seven F1- atoms. There are a spread of Pb–F bond distances ranging from 2.38–3.06 Å. In the second Pb2+ site, Pb2+ is bonded in a 10-coordinate geometry to ten F1- atoms. There are a spread of Pb–F bond distances ranging from 2.46–2.97 Å. There are seven inequivalent F1- sites. In the first F1- site, F1- is bonded in a 1-coordinate geometry to one Fe3+ and two equivalent Pb2+ atoms. In the second F1- site, F1- is bonded in a 2-coordinate geometry to one Fe3+ and two Pb2+ atoms. In the third F1- site, F1- is bonded in a distorted single-bond geometry to one Fe3+ and two equivalent Pb2+ atoms. In the fourth F1- site, F1- is bonded in a trigonal planar geometry to three Pb2+ atoms. In the fifth F1- site, F1- is bonded in a linear geometry to two equivalent Fe3+ atoms. In the sixth F1- site, F1- is bonded in a distorted single-bond geometry to one Fe3+ and two equivalent Pb2+ atoms. In the seventh F1- site, F1- is bonded in a 2-coordinate geometry to one Fe3+ and two equivalent Pb2+ atoms.