Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Ba-Co-Fe-O-Sr”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

Materials Data on BaSr7Fe6(CoO12)2 by Materials Project

BaSr7Fe6(CoO12)2 is (Cubic) Perovskite-derived structured and crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. Ba is bonded to twelve O atoms to form BaO12 cuboctahedra that share corners with twelve SrO12 cuboctahedra, faces with six SrO12 cuboctahedra, faces with two equivalent CoO6 octahedra, and faces with six FeO6 octahedra. There are a spread of Ba–O bond distances ranging from 2.79–2.84 Å. There are five 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 BaO12 cuboctahedra, faces with four SrO12 cuboctahedra, faces with two equivalent CoO6 octahedra, and faces with six FeO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.74–2.80 Å. In the second Sr site, Sr is bonded to twelve O atoms to form SrO12 cuboctahedra that share corners with four equivalent BaO12 cuboctahedra, corners with eight equivalent SrO12 cuboctahedra, faces with six SrO12 cuboctahedra, faces with two equivalent CoO6 octahedra, and faces with six FeO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.71–2.79 Å. In the third Sr site, Sr is bonded to twelve O atoms to form SrO12 cuboctahedra that share corners with four equivalent BaO12 cuboctahedra, corners with eight SrO12 cuboctahedra, faces with six SrO12 cuboctahedra, faces with two equivalent CoO6 octahedra, and faces with six FeO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.73–2.79 Å. In the fourth Sr site, Sr is bonded to twelve O atoms to form SrO12 cuboctahedra that share corners with twelve SrO12 cuboctahedra, faces with six SrO12 cuboctahedra, faces with two equivalent CoO6 octahedra, and faces with six FeO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.74–2.78 Å. In the fifth Sr site, Sr is bonded to twelve O atoms to form SrO12 cuboctahedra that share corners with twelve SrO12 cuboctahedra, faces with two equivalent BaO12 cuboctahedra, faces with four equivalent SrO12 cuboctahedra, faces with two equivalent CoO6 octahedra, and faces with six FeO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.76–2.80 Å. There are two 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, a faceface with one BaO12 cuboctahedra, and faces with seven SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Fe–O bond distances ranging from 1.96–1.98 Å. In the second 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, a faceface with one BaO12 cuboctahedra, and faces with seven SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Fe–O bond distances ranging from 1.94–2.04 Å. Co is bonded to six O atoms to form CoO6 octahedra that share corners with two equivalent CoO6 octahedra, corners with four equivalent FeO6 octahedra, a faceface with one BaO12 cuboctahedra, and faces with seven SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Co–O bond distances ranging from 1.88–1.98 Å. There are ten inequivalent O sites. In the first O site, O is bonded to one Ba, three Sr, and two equivalent Fe atoms to form distorted OBaSr3Fe2 octahedra that share corners with twelve OBaSr3Co2 octahedra, edges with four equivalent OBaSr3Fe2 octahedra, and faces with four equivalent OBaSr3Fe2 octahedra. The corner-sharing octahedra tilt angles range from 0–60°. In the second O site, O is bonded to one Ba, three Sr, and two equivalent Fe atoms to form a mixture of distorted corner, edge, and face-sharing OBaSr3Fe2 octahedra. The corner-sharing octahedra tilt angles range from 1–62°. In the third O site, O is bonded to one Ba, three Sr, and two equivalent Co atoms to form distorted OBaSr3Co2 octahedra that share corners with fourteen OBaSr3Fe2 octahedra, edges with four equivalent OBaSr3Fe2 octahedra, and faces with four equivalent OBaSr3FeCo 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 four Sr and two equivalent Fe atoms. In the fifth O site, O is bonded to four Sr and two equivalent Fe atoms to form distorted OSr4Fe2 octahedra that share corners with fourteen OBaSr3Fe2 octahedra, edges with two equivalent OSr4Co2 octahedra, and faces with four OBaSr3Fe2 octahedra. The corner-sharing octahedra tilt angles range from 1–61°. In the sixth O site, O is bonded to four Sr and two equivalent Co atoms to form distorted OSr4Co2 octahedra that share corners with ten OBaSr3Fe2 octahedra, edges with four equivalent OSr4Fe2 octahedra, and faces with four equivalent OBaSr3FeCo octahedra. The corner-sharing octahedra tilt angles range from 1–60°. In the seventh O site, O is bonded in a distorted linear geometry to four Sr and two Fe atoms. In the eighth O site, O is bonded in a distorted linear geometry to four Sr, one Fe, and one Co atom. In the ninth O site, O is bonded to one Ba, three Sr, and two Fe atoms to form a mixture of distorted corner, edge, and face-sharing OBaSr3Fe2 octahedra. The corner-sharing octahedra tilt angles range from 1–61°. In the tenth O site, O is bonded to one Ba, three Sr, one Fe, and one Co atom to form a mixture of distorted corner, edge, and face-sharing OBaSr3FeCo octahedra. The corner-sharing octahedra tilt angles range from 1–63°.

36 MATERIALS SCIENCE↗

Materials Data on BaSr7Fe7CoO24 by Materials Project

BaSr7Fe7CoO24 is (Cubic) Perovskite-derived structured and crystallizes in the trigonal R3m space group. The structure is three-dimensional. Ba is bonded to twelve O atoms to form BaO12 cuboctahedra that share corners with twelve equivalent SrO12 cuboctahedra, faces with six equivalent SrO12 cuboctahedra, a faceface with one CoO6 octahedra, and faces with seven FeO6 octahedra. All Ba–O bond lengths are 2.81 Å. 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 BaO12 cuboctahedra, faces with four equivalent SrO12 cuboctahedra, a faceface with one CoO6 octahedra, and faces with seven FeO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.77–2.79 Å. In the second Sr site, Sr is bonded to twelve O atoms to form SrO12 cuboctahedra that share corners with four equivalent BaO12 cuboctahedra, corners with eight equivalent SrO12 cuboctahedra, faces with six SrO12 cuboctahedra, a faceface with one CoO6 octahedra, and faces with seven FeO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.74–2.78 Å. In the third Sr site, Sr is bonded to twelve O atoms to form SrO12 cuboctahedra that share corners with twelve equivalent SrO12 cuboctahedra, faces with six equivalent SrO12 cuboctahedra, a faceface with one CoO6 octahedra, and faces with seven FeO6 octahedra. There are nine shorter (2.77 Å) and three longer (2.78 Å) Sr–O bond lengths. There are three 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, a faceface with one BaO12 cuboctahedra, and faces with seven SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–2°. There is three shorter (1.97 Å) and three longer (1.98 Å) Fe–O bond length. In the second Fe site, Fe is bonded to six O atoms to form FeO6 octahedra that share corners with two equivalent CoO6 octahedra, corners with four equivalent FeO6 octahedra, a faceface with one BaO12 cuboctahedra, and faces with seven SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of Fe–O bond distances ranging from 1.95–2.03 Å. In the third Fe site, Fe is bonded to six O atoms to form FeO6 octahedra that share corners with six equivalent FeO6 octahedra, a faceface with one BaO12 cuboctahedra, and faces with seven SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–2°. There is three shorter (1.95 Å) and three longer (1.96 Å) Fe–O bond length. Co is bonded to six O atoms to form CoO6 octahedra that share corners with six equivalent FeO6 octahedra, a faceface with one BaO12 cuboctahedra, and faces with seven SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–1°. There is three shorter (1.90 Å) and three longer (1.91 Å) Co–O bond length. There are six inequivalent O sites. In the first O site, O is bonded to one Ba, three Sr, and two Fe atoms to form a mixture of distorted edge, face, and corner-sharing OBaSr3Fe2 octahedra. The corner-sharing octahedra tilt angles range from 1–61°. In the second O site, O is bonded to one Ba, three Sr, and two Fe atoms to form a mixture of distorted edge, face, and corner-sharing OBaSr3Fe2 octahedra. The corner-sharing octahedra tilt angles range from 0–62°. In the third O site, O is bonded to one Ba, three Sr, one Fe, and one Co atom to form a mixture of distorted edge, face, and corner-sharing OBaSr3FeCo octahedra. The corner-sharing octahedra tilt angles range from 1–62°. In the fourth O site, O is bonded to four Sr and two Fe atoms to form distorted OSr4Fe2 octahedra that share corners with fourteen OBaSr3Fe2 octahedra, edges with four equivalent OSr4Fe2 octahedra, and faces with eight OBaSr3Fe2 octahedra. The corner-sharing octahedra tilt angles range from 1–60°. 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 OBaSr3Fe2 octahedra, edges with two equivalent OSr4Fe2 octahedra, and faces with seven OBaSr3Fe2 octahedra. The corner-sharing octahedra tilt angles range from 1–61°. In the sixth O site, O is bonded in a distorted linear geometry to four Sr, one Fe, and one Co atom.

36 MATERIALS SCIENCE↗

Materials Data on BaSr7Fe7CoO20 by Materials Project

BaSr7Fe7CoO20 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are four inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Ba–O bond distances ranging from 2.63–3.14 Å. In the second Ba2+ site, Ba2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Ba–O bond distances ranging from 2.62–3.13 Å. In the third Ba2+ site, Ba2+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Ba–O bond distances ranging from 2.64–3.31 Å. In the fourth Ba2+ site, Ba2+ is bonded in a 9-coordinate geometry to eight O2- atoms. There are a spread of Ba–O bond distances ranging from 2.65–3.03 Å. There are twenty-eight inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.47–2.96 Å. In the second Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.48–2.95 Å. In the third Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.47–2.96 Å. In the fourth Sr2+ site, Sr2+ is bonded in a 9-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.52–2.83 Å. In the fifth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.47–2.96 Å. In the sixth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.49–2.91 Å. In the seventh Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.51–3.03 Å. In the eighth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.45–2.99 Å. In the ninth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.49–3.01 Å. In the tenth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.48–2.97 Å. In the eleventh Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.50–2.94 Å. In the twelfth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.48–2.90 Å. In the thirteenth Sr2+ site, Sr2+ is bonded in a 7-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.49–3.05 Å. In the fourteenth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.52–2.93 Å. In the fifteenth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.48–2.94 Å. In the sixteenth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.47–2.94 Å. In the seventeenth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.51–2.96 Å. In the eighteenth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.47–2.94 Å. In the nineteenth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.54–2.85 Å. In the twentieth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.47–2.92 Å. In the twenty-first Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.41–3.02 Å. In the twenty-second Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.49–2.91 Å. In the twenty-third Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.43–3.01 Å. In the twenty-fourth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.49–2.94 Å. In the twenty-fifth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.45–2.93 Å. In the twenty-sixth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.50–2.95 Å. In the twenty-seventh Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.45–2.94 Å. In the twenty-eighth Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.50–2.97 Å. There are twenty-eight inequivalent Fe3+ sites. In the first Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with four FeO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 5–9°. There are a spread of Fe–O bond distances ranging from 1.99–2.28 Å. In the second Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with four FeO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 8–9°. There are a spread of Fe–O bond distances ranging from 1.98–2.30 Å. In the third Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with four FeO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 6–9°. There are a spread of Fe–O bond distances ranging from 2.00–2.27 Å. In the fourth Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share a cornercorner with one CoO6 octahedra, corners with three FeO6 octahedra, and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 1–9°. There are a spread of Fe–O bond distances ranging from 1.95–2.45 Å. In the fifth Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with four FeO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 8–10°. There are a spread of Fe–O bond distances ranging from 1.99–2.26 Å. In the sixth Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share a cornercorner with one FeO6 octahedra, corners with two CoO6 octahedra, a cornercorner with one CoO5 square pyramid, and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 3–8°. There are a spread of Fe–O bond distances ranging from 1.94–2.36 Å. In the seventh Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with four FeO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 6–10°. There are a spread of Fe–O bond distances ranging from 2.01–2.27 Å. In the eighth Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share a cornercorner with one FeO6 octahedra, corners with two CoO6 octahedra, a cornercorner with one CoO5 square pyramid, and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 3–12°. There are a spread of Fe–O bond distances ranging from 1.96–2.48 Å. In the ninth Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with four FeO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedral tilt angles are 8°. There are a spread of Fe–O bond distances ranging from 1.99–2.27 Å. In the tenth Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share a cornercorner with one FeO6 octahedra, corners with two CoO6 octahedra, a cornercorner with one CoO5 square pyramid, and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 5–9°. There are a spread of Fe–O bond distances ranging from 1.96–2.28 Å. In the eleventh Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with four FeO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 5–9°. There are a spread of Fe–O bond distances ranging from 2.01–2.23 Å. In the twelfth Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with four FeO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 8–9°. There are a spread of Fe–O bond distances ranging from 1.99–2.24 Å. In the thirteenth Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share a cornercorner with one FeO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedral tilt angles are 33°. There are a spread of Fe–O bond distances ranging from 1.86–1.94 Å. In the fourteenth Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with two FeO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 31–32°. There are a spread of Fe–O bond distances ranging from 1.90–1.95 Å. In the fifteenth Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share a cornercorner with one FeO6 octahedra, a cornercorner with one CoO6 octahedra, and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 27–31°. There are a spread of Fe–O bond distances ranging from 1.87–1.95 Å. In the sixteenth Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with two FeO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 31–32°. There is two shorter (1.90 Å) and two longer (1.94 Å) Fe–O bond length. In the seventeenth Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share a cornercorner with one FeO6 octahedra, a cornercorner with one CoO6 octahedra, and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 32–33°. There are a spread of Fe–O bond distances ranging from 1.87–1.94 Å. In the eighteenth Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with two FeO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 30–31°. There are a spread of Fe–O bond distances ranging from 1.89–1.95 Å. In the nineteenth Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with two FeO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 30–31°. There are a spread of Fe–O bond distances ranging from 1.89–1.94 Å. In the twentieth Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share a cornercorner with one FeO6 octahedra, a cornercorner with one CoO6 octahedra, and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 32–33°. There are a spread of Fe–O bond distances ranging from 1.89–1.95 Å. In the twenty-first Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with two FeO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 23–31°. There are a spread of Fe–O bond distances ranging from 1.90–1.95 Å. In the twenty-second Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with two FeO6 octahedra and corners with two FeO4 tetrahedra. T

36 MATERIALS SCIENCE↗