DOI: 10.17188/1475878
title: Materials Data on Sr6Ca2Co7CuO24 by Materials Project

description: Sr6Ca2Co7CuO24 is (Cubic) Perovskite-derived structured and crystallizes in the orthorhombic Cmm2 space group. The structure is three-dimensional. there are three inequivalent Sr sites. In the first Sr site, Sr is bonded to twelve O atoms to form SrO12 cuboctahedra that share corners with twelve SrO12 cuboctahedra, faces with two equivalent CaO12 cuboctahedra, faces with four equivalent SrO12 cuboctahedra, a faceface with one CuO6 octahedra, and faces with seven CoO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.72–2.74 Å. In the second Sr site, Sr is bonded to twelve O atoms to form SrO12 cuboctahedra that share corners with four equivalent SrO12 cuboctahedra, corners with eight equivalent CaO12 cuboctahedra, faces with six SrO12 cuboctahedra, a faceface with one CuO6 octahedra, and faces with seven CoO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.71–2.76 Å. In the third Sr site, Sr is bonded to twelve O atoms to form SrO12 cuboctahedra that share corners with twelve SrO12 cuboctahedra, faces with two equivalent SrO12 cuboctahedra, faces with four equivalent CaO12 cuboctahedra, a faceface with one CuO6 octahedra, and faces with seven CoO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.71–2.73 Å. Ca is bonded to twelve O atoms to form CaO12 cuboctahedra that share corners with four equivalent CaO12 cuboctahedra, corners with eight equivalent SrO12 cuboctahedra, faces with six SrO12 cuboctahedra, a faceface with one CuO6 octahedra, and faces with seven CoO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.68–2.73 Å. There are five inequivalent Co sites. In the first Co site, Co is bonded to six O atoms to form CoO6 octahedra that share corners with two equivalent CuO6 octahedra, corners with four CoO6 octahedra, faces with two equivalent CaO12 cuboctahedra, and faces with six SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Co–O bond distances ranging from 1.89–1.96 Å. In the second Co site, Co is bonded to six O atoms to form CoO6 octahedra that share corners with two equivalent CuO6 octahedra, corners with four equivalent CoO6 octahedra, faces with two equivalent CaO12 cuboctahedra, and faces with six SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are a spread of Co–O bond distances ranging from 1.89–1.95 Å. In the third Co site, Co is bonded to six O atoms to form CoO6 octahedra that share corners with six CoO6 octahedra, faces with two equivalent CaO12 cuboctahedra, and faces with six SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are a spread of Co–O bond distances ranging from 1.90–1.92 Å. In the fourth Co site, Co is bonded to six O atoms to form CoO6 octahedra that share corners with six CoO6 octahedra, faces with two equivalent CaO12 cuboctahedra, and faces with six SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–1°. There is two shorter (1.89 Å) and four longer (1.91 Å) Co–O bond length. In the fifth Co site, Co is bonded to six O atoms to form CoO6 octahedra that share corners with six CoO6 octahedra, faces with two equivalent CaO12 cuboctahedra, and faces with six SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are a spread of Co–O bond distances ranging from 1.92–1.98 Å. Cu is bonded to six O atoms to form CuO6 octahedra that share corners with six CoO6 octahedra, faces with two equivalent CaO12 cuboctahedra, and faces with six SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–2°. There is five shorter (1.95 Å) and one longer (1.97 Å) Cu–O bond length. There are ten inequivalent O sites. In the first O site, O is bonded to three Sr, one Ca, one Co, and one Cu atom to form distorted OSr3CaCoCu octahedra that share corners with eighteen OSr3CaCoCu octahedra, edges with four OSr3CaCo2 octahedra, and faces with seven OSr3CaCoCu octahedra. The corner-sharing octahedra tilt angles range from 1–61°. In the second O site, O is bonded to three Sr, one Ca, and two Co atoms to form distorted OSr3CaCo2 octahedra that share corners with twenty OSr3CaCo2 octahedra, edges with four OSr3CaCoCu octahedra, and faces with six OSr3CaCoCu octahedra. The corner-sharing octahedra tilt angles range from 1–61°. In the third O site, O is bonded to three Sr, one Ca, and two Co atoms to form distorted OSr3CaCo2 octahedra that share corners with eighteen OSr3CaCoCu octahedra, edges with four OSr3CaCoCu octahedra, and faces with seven OSr3CaCo2 octahedra. The corner-sharing octahedra tilt angles range from 1–61°. In the fourth O site, O is bonded to three Sr, one Ca, and two Co atoms to form distorted OSr3CaCo2 octahedra that share corners with twenty OSr3CaCoCu octahedra, edges with four OSr3CaCo2 octahedra, and faces with six OSr3CaCo2 octahedra. The corner-sharing octahedra tilt angles range from 1–61°. In the fifth O site, O is bonded to four Sr, one Co, and one Cu atom to form distorted OSr4CoCu octahedra that share corners with twenty-two OSr3CaCo2 octahedra, edges with four equivalent OSr4Co2 octahedra, and faces with eight OSr3CaCoCu octahedra. The corner-sharing octahedra tilt angles range from 0–61°. In the sixth O site, O is bonded to four Sr and two Co atoms to form distorted OSr4Co2 octahedra that share corners with twenty OSr3CaCoCu octahedra, edges with four OSr4CoCu octahedra, and faces with eight OSr3CaCoCu octahedra. The corner-sharing octahedra tilt angles range from 1–61°. In the seventh O site, O is bonded to two equivalent Sr, two equivalent Ca, one Co, and one Cu atom to form distorted OSr2Ca2CoCu octahedra that share corners with eighteen OSr4CoCu octahedra and faces with eight OSr3CaCoCu octahedra. The corner-sharing octahedra tilt angles range from 0–61°. In the eighth O site, O is bonded in a distorted linear geometry to two equivalent Sr, two equivalent Ca, and two Co atoms. In the ninth O site, O is bonded to four Sr and two Co atoms to form distorted OSr4Co2 octahedra that share corners with twenty OSr4CoCu octahedra, edges with four equivalent OSr4Co2 octahedra, and faces with eight OSr3CaCo2 octahedra. The corner-sharing octahedra tilt angles range from 0–61°. In the tenth O site, O is bonded in a distorted linear geometry to two equivalent Sr, two equivalent Ca, and two Co atoms.