SEARCH · Engineering Papers

Results for “spreading”

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.

SourceResearch connectionFrom yearThrough year

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

Sr6Ca2Fe3(CoO4)5 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are twenty-four 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 2.47–2.86 Å. In the second 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 2.46–3.19 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 2.47–2.85 Å. In the fourth 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 2.53–3.19 Å. In the fifth 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 2.44–2.91 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 2.46–2.86 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 2.48–3.15 Å. In the eighth 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 2.46–3.09 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 2.46–2.89 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 2.45–2.87 Å. In the eleventh 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 2.46–2.92 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 2.40–2.95 Å. In the thirteenth 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 2.49–2.86 Å. In the fourteenth 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 2.52–3.13 Å. In the fifteenth 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 2.45–3.20 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 2.43–2.96 Å. In the seventeenth 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 2.46–2.88 Å. In the eighteenth 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 2.52–3.18 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 2.47–2.85 Å. In the twentieth 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 2.49–3.19 Å. In the twenty-first 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 2.45–3.01 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 2.50–2.82 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 2.45–2.90 Å. In the twenty-fourth 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 2.49–3.09 Å. There are eight inequivalent Ca2+ sites. In the first Ca2+ site, Ca2+ is bonded in a 7-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.31–3.00 Å. In the second Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.31–2.98 Å. In the third Ca2+ site, Ca2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Ca–O bond distances ranging from 2.33–2.56 Å. In the fourth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.30–3.00 Å. In the fifth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.34–2.96 Å. In the sixth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.33–2.95 Å. In the seventh Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.30–2.87 Å. In the eighth Ca2+ site, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.34–2.95 Å. There are twelve inequivalent Fe3+ sites. In the first Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with two CoO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 27–34°. There are a spread of Fe–O bond distances ranging from 1.87–1.95 Å. In the second Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with two CoO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 26–36°. There are a spread of Fe–O bond distances ranging from 1.88–1.95 Å. In the third Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with two CoO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 28–36°. There are a spread of Fe–O bond distances ranging from 1.88–1.96 Å. In the fourth Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with two CoO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 29–30°. There are a spread of Fe–O bond distances ranging from 1.88–1.96 Å. In the fifth Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with two CoO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 28–33°. There are a spread of Fe–O bond distances ranging from 1.88–1.95 Å. In the sixth Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with two CoO6 octahedra and corners with two CoO4 tetrahedra. The corner-sharing octahedra tilt angles range from 28–39°. There are a spread of Fe–O bond distances ranging from 1.89–1.93 Å. In the seventh Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with two CoO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 28–31°. There are a spread of Fe–O bond distances ranging from 1.87–1.96 Å. In the eighth Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with two CoO6 octahedra, a cornercorner with one FeO4 tetrahedra, and a cornercorner with one CoO4 tetrahedra. The corner-sharing octahedra tilt angles range from 27–40°. There are a spread of Fe–O bond distances ranging from 1.89–1.94 Å. In the ninth Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with two CoO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 28–31°. There are a spread of Fe–O bond distances ranging from 1.89–1.95 Å. In the tenth Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with two CoO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 30–32°. There are a spread of Fe–O bond distances ranging from 1.88–1.95 Å. In the eleventh Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with two CoO6 octahedra, a cornercorner with one FeO4 tetrahedra, and a cornercorner with one CoO4 tetrahedra. The corner-sharing octahedra tilt angles range from 29–40°. There are a spread of Fe–O bond distances ranging from 1.88–1.96 Å. In the twelfth Fe3+ site, Fe3+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with two CoO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 28–34°. There are a spread of Fe–O bond distances ranging from 1.89–1.95 Å. There are twenty inequivalent Co3+ sites. In the first Co3+ site, Co3+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with four CoO6 octahedra, a cornercorner with one FeO4 tetrahedra, and a cornercorner with one CoO4 tetrahedra. The corner-sharing octahedra tilt angles range from 6–15°. There are a spread of Co–O bond distances ranging from 1.83–2.36 Å. In the second Co3+ site, Co3+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with four CoO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 5–6°. There are a spread of Co–O bond distances ranging from 1.86–2.39 Å. In the third Co3+ site, Co3+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with four CoO6 octahedra, a cornercorner with one FeO4 tetrahedra, and a cornercorner with one CoO4 tetrahedra. The corner-sharing octahedra tilt angles range from 8–14°. There are a spread of Co–O bond distances ranging from 2.00–2.21 Å. In the fourth Co3+ site, Co3+ is bonded to six O2- atoms to form distorted CoO6 octahedra that share corners with four CoO6 octahedra, a cornercorner with one FeO4 tetrahedra, and a cornercorner with one CoO4 tetrahedra. The corner-sharing octahedra tilt angles range from 3–14°. There are a spread of Co–O bond distances ranging from 1.85–2.51 Å. In the fifth Co3+ site, Co3+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with four CoO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 7–10°. There are a spread of Co–O bond distances ranging from 2.00–2.23 Å. In the sixth Co3+ site, Co3+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with four CoO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 4–7°. There are a spread of Co–O bond distances ranging from 1.85–2.33 Å. In the seventh Co3+ site, Co3+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with four CoO6 octahedra, a cornercorner with one FeO4 tetrahedra, and a cornercorner with one CoO4 tetrahedra. The corner-sharing octahedra tilt angles range from 11–13°. There are a spread of Co–O bond distances ranging from 1.91–2.39 Å. In the eighth Co3+ site, Co3+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with four CoO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 6–13°. There are a spread of Co–O bond distances ranging from 1.86–2.38 Å. In the ninth Co3+ site, Co3+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with four CoO6 octahedra and corners with two FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 8–15°. There are a spread of Co–O bond distances ranging from 1.85–2.34 Å. In the tenth Co3+ site, Co3+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with four CoO6 octahedra, a cornercorner with one FeO4 tetrahedra, and a cornercorner with one CoO4 tetrahedra. The corner-sharing octahedra tilt angles range from 3–7°. There are a spread of Co–O bond distances ranging from

36 MATERIALS SCIENCE↗