Materials Data on SrLaCoO4 by Materials Project

Abstract

LaSrCoO4 is (La,Ba)CuO4-derived structured and crystallizes in the orthorhombic Cmcm 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 2.45–2.74 Å. La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.36–2.76 Å. Co3+ is bonded to six O2- atoms to form corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Co–O bond distances ranging from 1.92–2.22 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Sr2+, three equivalent La3+, and one Co3+ atom to form distorted OSr2La3Co octahedra that share corners with seventeen OSr2La2Co2 octahedra, edges with eight OSr2La3Co octahedra, and faces with four equivalent OSr2La2Co2 octahedra. The corner-sharing octahedra tilt angles range from 0–53°. In the second O2- site, O2- is bonded to three equivalent Sr2+, two equivalent La3+, and one Co3+ atom to form distorted OSr3La2Co octahedra that share corners with seventeen OSr2La2Co2 octahedra, edges with eight OSr2La3Co octahedra, and faces with four equivalent OSr2La2Co2 octahedra. The corner-sharing octahedra tilt angles range from 0–55°. In the third O2- site, O2- is bonded to two equivalent Sr2+, two equivalent La3+, and two equivalent Co3+ atoms to form a mixture of distorted edge, corner, and face-sharing OSr2La2Co2 octahedra. The corner-sharing octahedra tilt angles range from 1–55°.