Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Ce-Fe-Y”

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 CeYFe4 by Materials Project

CeYFe4 is Hexagonal Laves-derived structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional. Ce is bonded in a 12-coordinate geometry to four equivalent Y and twelve equivalent Fe atoms. All Ce–Y bond lengths are 3.16 Å. All Ce–Fe bond lengths are 3.03 Å. Y is bonded in a 12-coordinate geometry to four equivalent Ce and twelve equivalent Fe atoms. All Y–Fe bond lengths are 3.03 Å. Fe is bonded to three equivalent Ce, three equivalent Y, and six equivalent Fe atoms to form a mixture of corner, edge, and face-sharing FeCe3Y3Fe6 cuboctahedra. There are three shorter (2.57 Å) and three longer (2.59 Å) Fe–Fe bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeYFe17 by Materials Project

CeYFe17 crystallizes in the trigonal R3m space group. The structure is three-dimensional. Ce is bonded in a 10-coordinate geometry to nineteen Fe atoms. There are a spread of Ce–Fe bond distances ranging from 3.01–3.31 Å. Y is bonded in a 10-coordinate geometry to nineteen Fe atoms. There are a spread of Y–Fe bond distances ranging from 3.02–3.26 Å. There are six inequivalent Fe sites. In the first Fe site, Fe is bonded to one Ce, two equivalent Y, and nine Fe atoms to form FeCeY2Fe9 cuboctahedra that share corners with fifteen FeCeY2Fe9 cuboctahedra, edges with eight FeCe2YFe9 cuboctahedra, and faces with ten FeCeY2Fe9 cuboctahedra. There are a spread of Fe–Fe bond distances ranging from 2.45–2.65 Å. In the second Fe site, Fe is bonded to two equivalent Ce, one Y, and nine Fe atoms to form FeCe2YFe9 cuboctahedra that share corners with fifteen FeCeY2Fe9 cuboctahedra, edges with eight FeCe2YFe9 cuboctahedra, and faces with ten FeCeY2Fe9 cuboctahedra. There are a spread of Fe–Fe bond distances ranging from 2.45–2.64 Å. In the third Fe site, Fe is bonded in a 12-coordinate geometry to one Ce, one Y, and ten Fe atoms. There are a spread of Fe–Fe bond distances ranging from 2.44–2.77 Å. In the fourth Fe site, Fe is bonded to one Ce, one Y, and ten Fe atoms to form FeCeYFe10 cuboctahedra that share corners with fourteen FeCe2YFe9 cuboctahedra, edges with six FeCe2YFe9 cuboctahedra, and faces with ten FeCeY2Fe9 cuboctahedra. Both Fe–Fe bond lengths are 2.60 Å. In the fifth Fe site, Fe is bonded in a 2-coordinate geometry to one Ce and thirteen Fe atoms. The Fe–Fe bond length is 2.42 Å. In the sixth Fe site, Fe is bonded in a 2-coordinate geometry to one Y and thirteen Fe atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeYFe17 by Materials Project

CeYFe17 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Ce is bonded in a 8-coordinate geometry to twenty Fe atoms. There are a spread of Ce–Fe bond distances ranging from 2.96–3.21 Å. Y is bonded in a 6-coordinate geometry to eighteen Fe atoms. There are a spread of Y–Fe bond distances ranging from 2.97–3.28 Å. There are four inequivalent Fe sites. In the first Fe site, Fe is bonded in a 2-coordinate geometry to one Ce and thirteen Fe atoms. There are a spread of Fe–Fe bond distances ranging from 2.38–2.79 Å. In the second Fe site, Fe is bonded to one Ce, two equivalent Y, and nine Fe atoms to form a mixture of corner, edge, and face-sharing FeCeY2Fe9 cuboctahedra. There are a spread of Fe–Fe bond distances ranging from 2.45–2.61 Å. In the third Fe site, Fe is bonded to two equivalent Ce and ten Fe atoms to form a mixture of corner, edge, and face-sharing FeCe2Fe10 cuboctahedra. All Fe–Fe bond lengths are 2.46 Å. In the fourth Fe site, Fe is bonded in a 12-coordinate geometry to one Ce, one Y, and ten Fe atoms. There are one shorter (2.47 Å) and one longer (2.57 Å) Fe–Fe bond lengths.

36 MATERIALS SCIENCE↗