DOI: 10.17188/1475918
title: Materials Data on Sr6Ca2MnFe7O24 by Materials Project

description: Sr6Ca2MnFe7O24 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 MnO6 octahedra, and faces with seven FeO6 octahedra. There are three shorter (2.75 Å) and nine longer (2.76 Å) Sr–O bond lengths. 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 MnO6 octahedra, and faces with seven FeO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.75–2.78 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 MnO6 octahedra, and faces with seven FeO6 octahedra. There are seven shorter (2.75 Å) and five longer (2.76 Å) Sr–O bond lengths. 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 MnO6 octahedra, and faces with seven FeO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.73–2.76 Å. Mn is bonded to six O atoms to form MnO6 octahedra that share corners with six FeO6 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 one shorter (1.93 Å) and five longer (1.94 Å) Mn–O bond length. There are five inequivalent Fe sites. In the first Fe site, Fe is bonded to six O atoms to form FeO6 octahedra that share corners with six FeO6 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 Fe–O bond distances ranging from 1.93–1.95 Å. In the second Fe site, Fe is bonded to six O atoms to form FeO6 octahedra that share corners with two equivalent MnO6 octahedra, corners with four equivalent FeO6 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 Fe–O bond distances ranging from 1.95–1.97 Å. In the third Fe site, Fe is bonded to six O atoms to form FeO6 octahedra that share corners with two equivalent MnO6 octahedra, corners with four FeO6 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 one shorter (1.95 Å) and five longer (1.96 Å) Fe–O bond length. In the fourth Fe site, Fe is bonded to six O atoms to form FeO6 octahedra that share corners with six FeO6 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 five shorter (1.95 Å) and one longer (1.96 Å) Fe–O bond length. In the fifth Fe site, Fe is bonded to six O atoms to form FeO6 octahedra that share corners with six FeO6 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 five shorter (1.94 Å) and one longer (1.95 Å) Fe–O bond length. There are ten inequivalent O sites. In the first O site, O is bonded to three Sr, one Ca, and two Fe atoms to form a mixture of distorted edge, face, and corner-sharing OSr3CaFe2 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 Fe atoms to form a mixture of distorted edge, face, and corner-sharing OSr3CaFe2 octahedra. The corner-sharing octahedra tilt angles range from 0–61°. In the third O site, O is bonded to three Sr, one Ca, and two Fe atoms to form a mixture of distorted edge, face, and corner-sharing OSr3CaFe2 octahedra. The corner-sharing octahedra tilt angles range from 0–61°. In the fourth O site, O is bonded in a distorted linear geometry to three Sr, one Ca, one Mn, and one Fe atom. In the fifth O site, O is bonded to four Sr and two Fe atoms to form distorted OSr4Fe2 octahedra that share corners with sixteen OSr3CaFe2 octahedra, edges with four OSr4MnFe octahedra, and faces with six OSr3CaFe2 octahedra. The corner-sharing octahedra tilt angles range from 0–60°. In the sixth O site, O is bonded to four Sr, one Mn, and one Fe atom to form distorted OSr4MnFe octahedra that share corners with twenty OSr3CaFe2 octahedra, edges with four equivalent OSr4Fe2 octahedra, and faces with four equivalent OSr3CaFe2 octahedra. The corner-sharing octahedra tilt angles range from 0–60°. In the seventh O site, O is bonded in a distorted linear geometry to two equivalent Sr, two equivalent Ca, and two Fe atoms. In the eighth O site, O is bonded in a distorted linear geometry to two equivalent Sr, two equivalent Ca, one Mn, and one Fe atom. In the ninth O site, O is bonded to four Sr and two Fe atoms to form distorted OSr4Fe2 octahedra that share corners with twelve OSr4MnFe octahedra, edges with four equivalent OSr4Fe2 octahedra, and faces with eight OSr3CaFe2 octahedra. The corner-sharing octahedra tilt angles range from 0–60°. In the tenth O site, O is bonded in a distorted linear geometry to two equivalent Sr, two equivalent Ca, and two Fe atoms.