Materials Data on Sr2La2CrNiO8 by Materials Project

Abstract

Sr2La2CrNiO8 is (La,Ba)CuO4-derived structured and crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. there are two inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.46–2.76 Å. In the second Sr2+ site, Sr2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Sr–O bond distances ranging from 2.42–2.77 Å. There are two inequivalent La3+ sites. In the first La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.31–2.78 Å. In the second La3+ site, La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.40–2.79 Å. Cr4+ is bonded to six O2- atoms to form CrO6 octahedra that share corners with four equivalent NiO6 octahedra. The corner-sharing octahedral tilt angles are 1°. There are a spread of Cr–O bond distances ranging from 1.97–2.17 Å. Ni2+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with four equivalent CrO6 octahedra. The corner-sharing octahedral tilt angles are 1°. There are a spread of Ni–O bond distances ranging from 1.92–2.28 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded to two Sr2+, two La3+, one Cr4+, and one Ni2+ atom to form a mixture of distorted corner, edge, and face-sharing OSr2La2CrNi octahedra. The corner-sharing octahedra tilt angles range from 0–56°. In the second O2- site, O2- is bonded to two equivalent Sr2+, three La3+, and one Ni2+ atom to form distorted OSr2La3Ni octahedra that share corners with seventeen OSr2La3Ni octahedra, edges with eight OSr3La2Cr octahedra, and faces with four equivalent OSr2La2CrNi octahedra. The corner-sharing octahedra tilt angles range from 0–52°. In the third O2- site, O2- is bonded to three Sr2+, two equivalent La3+, and one Cr4+ atom to form distorted OSr3La2Cr octahedra that share corners with seventeen OSr3La2Cr octahedra, edges with eight OSr2La3Ni octahedra, and faces with four equivalent OSr2La2CrNi octahedra. The corner-sharing octahedra tilt angles range from 0–56°. In the fourth O2- site, O2- is bonded to two equivalent Sr2+, three La3+, and one Cr4+ atom to form distorted OSr2La3Cr octahedra that share corners with seventeen OSr3La2Cr octahedra, edges with eight OSr2La3Ni octahedra, and faces with four equivalent OSr2La2CrNi octahedra. The corner-sharing octahedra tilt angles range from 0–54°. In the fifth O2- site, O2- is bonded to three Sr2+, two equivalent La3+, and one Ni2+ atom to form distorted OSr3La2Ni octahedra that share corners with seventeen OSr2La3Ni octahedra, edges with eight OSr2La3Ni octahedra, and faces with four equivalent OSr2La2CrNi octahedra. The corner-sharing octahedra tilt angles range from 0–54°.