Search NASA⌕ Search

SEARCH · Search NASA

Results for “Ce-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.

2 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Sr2CeO4 by Materials Project

Sr2CeO4 crystallizes in the orthorhombic Pbam space group. The structure is three-dimensional. Sr2+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Sr–O bond distances ranging from 2.52–3.09 Å. Ce4+ is bonded to six O2- atoms to form edge-sharing CeO6 octahedra. There are two shorter (2.21 Å) and four longer (2.33 Å) Ce–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent Sr2+ and one Ce4+ atom to form a mixture of distorted edge and corner-sharing OSr4Ce trigonal bipyramids. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Sr2+ and two equivalent Ce4+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrCeO3 by Materials Project

SrCeO3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Sr2+ is bonded in a 4-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.52–3.10 Å. Ce4+ is bonded to six O2- atoms to form corner-sharing CeO6 octahedra. The corner-sharing octahedra tilt angles range from 34–36°. There are a spread of Ce–O bond distances ranging from 2.25–2.28 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Sr2+ and two equivalent Ce4+ atoms to form distorted corner-sharing OSr2Ce2 tetrahedra. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Sr2+ and two equivalent Ce4+ atoms.

36 MATERIALS SCIENCE↗