Materials Data on SrIrO3 by Materials Project

Abstract

SrIrO3 is Orthorhombic Perovskite-like structured and crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. there are two inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Sr–O bond distances ranging from 2.62–2.88 Å. In the second Sr2+ site, Sr2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Sr–O bond distances ranging from 2.47–3.03 Å. There are two inequivalent Ir4+ sites. In the first Ir4+ site, Ir4+ is bonded to six O2- atoms to form corner-sharing IrO6 octahedra. The corner-sharing octahedra tilt angles range from 29–33°. There are four shorter (2.01 Å) and two longer (2.02 Å) Ir–O bond lengths. In the second Ir4+ site, Ir4+ is bonded to six O2- atoms to form a mixture of corner and face-sharing IrO6 octahedra. The corner-sharing octahedra tilt angles range from 29–33°. There are a spread of Ir–O bond distances ranging from 2.00–2.09 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted L-shaped geometry to four Sr2+ and two equivalent Ir4+ atoms. In the second O2- site, O2- is bonded to four Sr2+ and two equivalent Ir4+ atoms to form a mixture of distorted corner and face-sharing OSr4Ir2 octahedra. The corner-sharing octahedra tilt angles range from 3–62°. In the third O2- site, O2- is bonded in a 4-coordinate geometry to three Sr2+ and two Ir4+ atoms. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to three equivalent Sr2+ and two Ir4+ atoms.