Materials Data on Sr2FeCu(PbO3)2 by Materials Project

Abstract

Sr2FeCu(PbO3)2 crystallizes in the orthorhombic Pnc2 space group. The structure is three-dimensional. Sr2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.62–3.00 Å. Fe3+ is bonded to six O2- atoms to form corner-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles are 4°. There are four shorter (1.98 Å) and two longer (2.21 Å) Fe–O bond lengths. Cu1+ is bonded in a linear geometry to two equivalent O2- atoms. Both Cu–O bond lengths are 1.86 Å. Pb2+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Pb–O bond distances ranging from 2.19–2.80 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent Sr2+ and two equivalent Fe3+ atoms to form a mixture of distorted corner, edge, and face-sharing OSr4Fe2 octahedra. The corner-sharing octahedral tilt angles are 0°. In the second O2- site, O2- is bonded in a 6-coordinate geometry to four equivalent Sr2+, one Fe3+, and one Pb2+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to one Sr2+, one Cu1+, and three equivalent Pb2+ atoms.