Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Ce-Mn-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.

3 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Sr3CeMn4O12 by Materials Project

Sr3CeMn4O12 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Im-3m space group. The structure is three-dimensional. Sr2+ is bonded to twelve equivalent O2- atoms to form SrO12 cuboctahedra that share corners with four equivalent CeO12 cuboctahedra, corners with eight equivalent SrO12 cuboctahedra, faces with two equivalent CeO12 cuboctahedra, faces with four equivalent SrO12 cuboctahedra, and faces with eight equivalent MnO6 octahedra. There are eight shorter (2.76 Å) and four longer (2.85 Å) Sr–O bond lengths. Ce3+ is bonded to twelve equivalent O2- atoms to form CeO12 cuboctahedra that share corners with twelve equivalent SrO12 cuboctahedra, faces with six equivalent SrO12 cuboctahedra, and faces with eight equivalent MnO6 octahedra. All Ce–O bond lengths are 2.66 Å. Mn+3.75+ is bonded to six equivalent O2- atoms to form MnO6 octahedra that share corners with six equivalent MnO6 octahedra, faces with two equivalent CeO12 cuboctahedra, and faces with six equivalent SrO12 cuboctahedra. The corner-sharing octahedral tilt angles are 5°. All Mn–O bond lengths are 1.95 Å. O2- is bonded in a distorted linear geometry to three equivalent Sr2+, one Ce3+, and two equivalent Mn+3.75+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sr4CeMn5O15 by Materials Project

Sr4CeMn5O15 is (Cubic) Perovskite-derived structured and crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded to twelve O2- atoms to form SrO12 cuboctahedra that share corners with two equivalent CeO12 cuboctahedra, corners with ten SrO12 cuboctahedra, faces with two equivalent CeO12 cuboctahedra, faces with four SrO12 cuboctahedra, and faces with eight MnO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.70–2.88 Å. In the second Sr2+ site, Sr2+ is bonded to twelve O2- atoms to form SrO12 cuboctahedra that share corners with three equivalent CeO12 cuboctahedra, corners with nine SrO12 cuboctahedra, a faceface with one CeO12 cuboctahedra, faces with five SrO12 cuboctahedra, and faces with eight MnO6 octahedra. There are a spread of Sr–O bond distances ranging from 2.68–2.95 Å. Ce3+ is bonded to twelve O2- atoms to form CeO12 cuboctahedra that share corners with two equivalent CeO12 cuboctahedra, corners with ten SrO12 cuboctahedra, faces with six SrO12 cuboctahedra, and faces with eight MnO6 octahedra. There are a spread of Ce–O bond distances ranging from 2.59–2.75 Å. There are three inequivalent Mn+3.80+ sites. In the first Mn+3.80+ site, Mn+3.80+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with six MnO6 octahedra, faces with two equivalent CeO12 cuboctahedra, and faces with six SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 5–7°. There is two shorter (1.93 Å) and four longer (1.95 Å) Mn–O bond length. In the second Mn+3.80+ site, Mn+3.80+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with six MnO6 octahedra, a faceface with one CeO12 cuboctahedra, and faces with seven SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–10°. There are a spread of Mn–O bond distances ranging from 1.94–1.98 Å. In the third Mn+3.80+ site, Mn+3.80+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with six MnO6 octahedra, faces with two equivalent CeO12 cuboctahedra, and faces with six SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–10°. There is three shorter (1.93 Å) and three longer (1.95 Å) Mn–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to three Sr2+, one Ce3+, and two Mn+3.80+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to three Sr2+, one Ce3+, and two Mn+3.80+ atoms. In the third O2- site, O2- is bonded in a distorted linear geometry to four Sr2+ and two equivalent Mn+3.80+ atoms. In the fourth O2- site, O2- is bonded in a distorted linear geometry to two equivalent Sr2+, two equivalent Ce3+, and two equivalent Mn+3.80+ atoms. In the fifth O2- site, O2- is bonded in a distorted linear geometry to four Sr2+ and two Mn+3.80+ atoms. In the sixth O2- site, O2- is bonded in a distorted linear geometry to three Sr2+, one Ce3+, and two Mn+3.80+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sr2CeMn3O9 by Materials Project

Sr2CeMn3O9 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 11-coordinate geometry to eleven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.44–2.99 Å. In the second Sr2+ site, Sr2+ is bonded in a 12-coordinate geometry to twelve O2- atoms. There are a spread of Sr–O bond distances ranging from 2.49–3.13 Å. Ce3+ is bonded in a 10-coordinate geometry to five O2- atoms. There are a spread of Ce–O bond distances ranging from 2.31–2.44 Å. There are four inequivalent Mn+3.67+ sites. In the first Mn+3.67+ site, Mn+3.67+ is bonded to six O2- atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedra tilt angles range from 14–35°. There are a spread of Mn–O bond distances ranging from 1.94–2.00 Å. In the second Mn+3.67+ site, Mn+3.67+ is bonded to six O2- atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedra tilt angles range from 18–22°. There are two shorter (1.98 Å) and four longer (2.04 Å) Mn–O bond lengths. In the third Mn+3.67+ site, Mn+3.67+ is bonded to six O2- atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedra tilt angles range from 14–35°. There are four shorter (2.01 Å) and two longer (2.07 Å) Mn–O bond lengths. In the fourth Mn+3.67+ site, Mn+3.67+ is bonded to six O2- atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedra tilt angles range from 18–22°. There is four shorter (1.96 Å) and two longer (2.01 Å) Mn–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Sr2+, one Ce3+, and two Mn+3.67+ atoms. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two Sr2+ and two Mn+3.67+ atoms. In the third O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Sr2+ and two Mn+3.67+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to three equivalent Sr2+ and two Mn+3.67+ atoms. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to two Sr2+, one Ce3+, and two Mn+3.67+ atoms. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to three equivalent Sr2+, one Ce3+, and two Mn+3.67+ atoms.

36 MATERIALS SCIENCE↗