Title: Materials Data on Sr6Ca2Fe5(CoO8)3 by Materials Project

Abstract

Sr6Ca2Fe5(CoO8)3 is (Cubic) Perovskite-derived structured and crystallizes in the monoclinic P2 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, faces with three CoO6 octahedra, and faces with five FeO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.71–2.77 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, faces with three CoO6 octahedra, and faces with five FeO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.71–2.80 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, faces with three CoO6 octahedra, and faces with five FeO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.69–2.78 Å. Ca is bondedmore » 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, faces with three CoO6 octahedra, and faces with five FeO6 octahedra. There are a spread of Ca–O bond distances ranging from 2.66–2.79 Å. 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 1.92–1.96 Å. In the second Fe site, Fe is bonded to six O atoms to form FeO6 octahedra that share corners with two equivalent FeO6 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 0–1°. There are a spread of Fe–O bond distances ranging from 1.93–2.07 Å. In the third Fe site, Fe is bonded to six O atoms to form FeO6 octahedra that share corners with two equivalent CoO6 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 0–2°. There are a spread of Fe–O bond distances ranging from 1.93–1.96 Å. In the fourth Fe site, Fe is bonded to six O atoms to form FeO6 octahedra that share corners with two equivalent CoO6 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 0–2°. There are a spread of Fe–O bond distances ranging from 1.93–2.00 Å. In the fifth Fe site, Fe is bonded to six O atoms to form FeO6 octahedra that share corners with two equivalent CoO6 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 0–2°. There are a spread of Fe–O bond distances ranging from 1.92–1.95 Å. There are three 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 CoO6 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 0–2°. There are a spread of Co–O bond distances ranging from 1.81–2.03 Å. In the second Co site, Co is bonded to six O atoms to form CoO6 octahedra that share corners with two equivalent CoO6 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 0–2°. 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 two equivalent FeO6 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 1.83–1.95 Å. There are sixteen inequivalent O sites. In the first O site, O is bonded in a distorted linear geometry to three Sr, one Ca, and two Fe atoms. In the second O site, O is bonded to three Sr, one Ca, one Fe, and one Co atom to form distorted OSr3CaFeCo octahedra that share corners with sixteen OSr3CaFeCo octahedra, edges with two equivalent OSr3CaCo2 octahedra, and faces with five OSr3CaFeCo octahedra. The corner-sharing octahedra tilt angles range from 1–61°. In the third O site, O is bonded in a distorted linear geometry to three Sr, one Ca, and two Fe atoms. In the fourth O site, O is bonded to three Sr, one Ca, and two Co atoms to form a mixture of distorted edge, face, and corner-sharing OSr3CaCo2 octahedra. The corner-sharing octahedra tilt angles range from 1–62°. In the fifth O site, O is bonded to four Sr and two Fe atoms to form distorted OSr4Fe2 octahedra that share corners with twenty OSr3CaFeCo octahedra, edges with four OSr4FeCo octahedra, and faces with two equivalent OSr3CaFeCo octahedra. The corner-sharing octahedra tilt angles range from 1–61°. In the sixth O site, O is bonded to four Sr, one Fe, and one Co atom to form distorted OSr4FeCo octahedra that share corners with twelve OSr3CaFeCo octahedra, edges with four OSr4Fe2 octahedra, and faces with six OSr3CaFeCo octahedra. The corner-sharing octahedra tilt angles range from 2–62°. 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 Fe, and one Co 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 eighteen OSr3CaFeCo octahedra, edges with four OSr4Fe2 octahedra, and faces with four OSr3CaFeCo octahedra. The corner-sharing octahedra tilt angles range from 0–61°. In the tenth O site, O is bonded to four Sr and two Co atoms to form distorted OSr4Co2 octahedra that share corners with ten OSr3CaFeCo octahedra, edges with four OSr4FeCo octahedra, and faces with eight OSr3CaFeCo octahedra. The corner-sharing octahedra tilt angles range from 0–60°. In the eleventh O site, O is bonded to two equivalent Sr, two equivalent Ca, and two Fe atoms to form distorted OSr2Ca2Fe2 octahedra that share corners with fourteen OSr3CaFeCo octahedra, edges with two equivalent OSr2Ca2Co2 octahedra, and faces with four OSr3CaFeCo octahedra. The corner-sharing octahedra tilt angles range from 0–60°. In the twelfth O site, O is bonded to two equivalent Sr, two equivalent Ca, and two Co atoms to form distorted OSr2Ca2Co2 octahedra that share corners with six OSr3CaFeCo octahedra, edges with two equivalent OSr2Ca2Fe2 octahedra, and faces with eight OSr3CaFeCo octahedra. The corner-sharing octahedra tilt angles range from 0–59°. In the thirteenth O site, O is bonded in a distorted linear geometry to three Sr, one Ca, and two Fe atoms. In the fourteenth O site, O is bonded to three Sr, one Ca, one Fe, and one Co atom to form distorted OSr3CaFeCo octahedra that share corners with eighteen OSr3CaFeCo octahedra, edges with two equivalent OSr3CaFeCo octahedra, and faces with four OSr3CaCo2 octahedra. The corner-sharing octahedra tilt angles range from 1–61°. In the fifteenth O site, O is bonded to three Sr, one Ca, one Fe, and one Co atom to form a mixture of distorted edge, face, and corner-sharing OSr3CaFeCo octahedra. The corner-sharing octahedra tilt angles range from 1–62°. In the sixteenth O site, O is bonded to three Sr, one Ca, one Fe, and one Co atom to form distorted OSr3CaFeCo octahedra that share corners with ten OSr3CaFeCo octahedra, edges with four OSr3CaFeCo octahedra, and faces with six OSr3CaCo2 octahedra. The corner-sharing octahedra tilt angles range from 1–62°.« less

Authors:

The Materials Project

Publication Date:

Thu Apr 30 00:00:00 EDT 2020

Other Number(s):

mp-1076457

DOE Contract Number:  

AC02-05CH11231; EDCBEE

Research Org.:

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). LBNL Materials Project

Sponsoring Org.:

USDOE Office of Science (SC), Basic Energy Sciences (BES)

Collaborations:

MIT; UC Berkeley; Duke; U Louvain

Subject:

36 MATERIALS SCIENCE

Keywords:

crystal structure; Sr6Ca2Fe5(CoO8)3; Ca-Co-Fe-O-Sr

OSTI Identifier:

1475665

DOI:

https://doi.org/10.17188/1475665