DOE OSTI2020
Ba6Sr2CoCu7O20 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are twenty-four inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.64–3.07 Å. In the second Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.70–3.18 Å. In the third Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.72–3.16 Å. In the fourth Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.73–3.11 Å. In the fifth Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.71–2.95 Å. In the sixth Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.70–3.13 Å. In the seventh Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.67–3.12 Å. In the eighth Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.73–3.08 Å. In the ninth Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.72–3.24 Å. In the tenth Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.71–3.10 Å. In the eleventh Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.69–3.36 Å. In the twelfth Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.71–3.02 Å. In the thirteenth Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.70–3.06 Å. In the fourteenth Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.71–2.99 Å. In the fifteenth Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.68–3.22 Å. In the sixteenth Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.69–3.03 Å. In the seventeenth Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.71–3.12 Å. In the eighteenth Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.68–3.30 Å. In the nineteenth Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.71–3.04 Å. In the twentieth Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.70–3.06 Å. In the twenty-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 2.72–3.10 Å. In the twenty-second Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.70–3.08 Å. In the twenty-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 2.71–2.97 Å. In the twenty-fourth Ba2+ site, Ba2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Ba–O bond distances ranging from 2.69–3.36 Å. There are eight 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 2.58–3.11 Å. In the second Sr2+ site, Sr2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Sr–O bond distances ranging from 2.57–3.18 Å. In the third 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 2.58–3.08 Å. In the fourth Sr2+ site, Sr2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Sr–O bond distances ranging from 2.56–3.25 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 2.56–2.94 Å. In the sixth 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 2.58–3.04 Å. In the seventh 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 2.58–3.12 Å. In the eighth Sr2+ site, Sr2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are a spread of Sr–O bond distances ranging from 2.54–3.22 Å. There are four inequivalent Co4+ sites. In the first Co4+ site, Co4+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Co–O bond distances ranging from 1.83–2.60 Å. In the second Co4+ site, Co4+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with two CuO6 octahedra, a cornercorner with one CoO5 square pyramid, a cornercorner with one CuO5 square pyramid, a cornercorner with one CuO4 tetrahedra, and a cornercorner with one CuO4 trigonal pyramid. The corner-sharing octahedra tilt angles range from 1–6°. There are a spread of Co–O bond distances ranging from 1.84–2.41 Å. In the third Co4+ site, Co4+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with two CuO6 octahedra, a cornercorner with one CoO5 square pyramid, a cornercorner with one CuO5 square pyramid, a cornercorner with one CuO4 tetrahedra, and a cornercorner with one CuO4 trigonal pyramid. The corner-sharing octahedra tilt angles range from 1–7°. There are a spread of Co–O bond distances ranging from 1.83–2.40 Å. In the fourth Co4+ site, Co4+ is bonded to five O2- atoms to form CoO5 square pyramids that share a cornercorner with one CuO6 octahedra, corners with two CoO6 octahedra, and a cornercorner with one CuO4 trigonal pyramid. The corner-sharing octahedra tilt angles range from 1–7°. There are a spread of Co–O bond distances ranging from 1.80–2.07 Å. There are twenty-eight inequivalent Cu+2.86+ sites. In the first Cu+2.86+ site, Cu+2.86+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with four CuO6 octahedra, a cornercorner with one CuO4 tetrahedra, and a cornercorner with one CuO4 trigonal pyramid. The corner-sharing octahedra tilt angles range from 3–12°. There are a spread of Cu–O bond distances ranging from 2.00–2.44 Å. In the second Cu+2.86+ site, Cu+2.86+ is bonded to five O2- atoms to form CuO5 square pyramids that share corners with four CuO6 octahedra and a cornercorner with one CuO4 trigonal pyramid. The corner-sharing octahedra tilt angles range from 3–8°. There are a spread of Cu–O bond distances ranging from 1.96–2.24 Å. In the third Cu+2.86+ site, Cu+2.86+ is bonded to six O2- atoms to form distorted CuO6 octahedra that share corners with four CuO6 octahedra, a cornercorner with one CuO4 tetrahedra, and a cornercorner with one CuO4 trigonal pyramid. The corner-sharing octahedra tilt angles range from 2–7°. There are a spread of Cu–O bond distances ranging from 1.96–2.55 Å. In the fourth Cu+2.86+ site, Cu+2.86+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with two CuO6 octahedra, a cornercorner with one CoO5 square pyramid, a cornercorner with one CuO5 square pyramid, a cornercorner with one CuO4 tetrahedra, and a cornercorner with one CuO4 trigonal pyramid. The corner-sharing octahedra tilt angles range from 3–4°. There are a spread of Cu–O bond distances ranging from 1.96–2.37 Å. In the fifth Cu+2.86+ site, Cu+2.86+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with four CuO6 octahedra and a cornercorner with one CuO4 tetrahedra. The corner-sharing octahedra tilt angles range from 1–4°. There are a spread of Cu–O bond distances ranging from 1.96–2.14 Å. In the sixth Cu+2.86+ site, Cu+2.86+ is bonded to five O2- atoms to form distorted CuO5 square pyramids that share a cornercorner with one CuO6 octahedra, corners with two CoO6 octahedra, and a cornercorner with one CuO4 tetrahedra. The corner-sharing octahedra tilt angles range from 2–9°. There are a spread of Cu–O bond distances ranging from 1.93–2.31 Å. In the seventh Cu+2.86+ site, Cu+2.86+ is bonded to six O2- atoms to form distorted CuO6 octahedra that share corners with three CuO6 octahedra, a cornercorner with one CuO5 square pyramid, a cornercorner with one CuO4 tetrahedra, and a cornercorner with one CuO4 trigonal pyramid. The corner-sharing octahedra tilt angles range from 1–12°. There are a spread of Cu–O bond distances ranging from 1.95–2.58 Å. In the eighth Cu+2.86+ site, Cu+2.86+ is bonded to six O2- atoms to form CuO6 octahedra that share a cornercorner with one CuO6 octahedra, corners with two CoO6 octahedra, and corners with two CuO4 trigonal pyramids. The corner-sharing octahedra tilt angles range from 1–7°. There are a spread of Cu–O bond distances ranging from 2.04–2.31 Å. In the ninth Cu+2.86+ site, Cu+2.86+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with three CuO6 octahedra, a cornercorner with one CuO5 square pyramid, a cornercorner with one CuO4 tetrahedra, and a cornercorner with one CuO4 trigonal pyramid. The corner-sharing octahedra tilt angles range from 2–4°. There are a spread of Cu–O bond distances ranging from 1.95–2.33 Å. In the tenth Cu+2.86+ site, Cu+2.86+ is bonded to six O2- atoms to form CuO6 octahedra that share a cornercorner with one CuO6 octahedra, corners with two CoO6 octahedra, a cornercorner with one CuO4 tetrahedra, and a cornercorner with one CuO4 trigonal pyramid. The corner-sharing octahedra tilt angles range from 1–6°. There are a spread of Cu–O bond distances ranging from 2.02–2.25 Å. In the eleventh Cu+2.86+ site, Cu+2.86+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with three CuO6 octahedra, a cornercorner with one CuO5 square pyramid, a cornercorner with one CuO4 tetrahedra, and a cornercorner with one CuO4 trigonal pyramid. The corner-sharing octahedra tilt angles range from 3–8°. There are a spread of Cu–O bond distances ranging from 1.95–2.34 Å. In the twelfth Cu+2.86+ site, Cu+2.86+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with three CuO6 octahedra, a cornercorner with one CuO5 square pyramid, and corners with two CuO4 trigonal pyramids. The corner-sharing octahedra tilt angles range from 3–4°. There are a spread of Cu–O bond distances ranging from 2.00–2.33 Å. In the thirteenth Cu+2.86+ site, Cu+2.86+ is bonded to four O2- atoms to form distorted CuO4 trigonal pyramids that share a cornercorner with one CuO6 octahedra and corners with two CuO4 trigonal pyramids. The corner-sharing octahedral tilt angles are 22°. There are a spread of Cu–O bond distances ranging from 1.81–1.89 Å. In the fourteenth Cu+2.86+ site, Cu+2.86+ is bonded to four O2- atoms to form distorted CuO4 tetrahedra that share a cornercorner with one CuO6 octahedra, a cornercorner with one CuO5 square pyramid, a cornercorner with one CuO4 tetrahedra, and a cornercorner with one CuO4 trigonal pyramid. The corner-sharing octahedral tilt angles are 28°. There are a spread of Cu–O bond distances ranging from 1.82–1.91 Å. In the fifteenth Cu+2.86+ site, Cu+2.86+ is bonded to four O2- atoms to form CuO4 trigonal pyramids that share a cornercorner with one CoO6 octahedra, a cornercorner with one CuO6 octahe