Search NASA⌕ Search

SEARCH · Search NASA

Results for “Bi-Dy-O-Ru”

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 Dy3Bi(Ru2O7)2 by Materials Project

Dy3Bi(Ru2O7)2 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Dy3+ is bonded in a distorted body-centered cubic geometry to eight O2- atoms. There are a spread of Dy–O bond distances ranging from 2.21–2.49 Å. There are two inequivalent Ru4+ sites. In the first Ru4+ site, Ru4+ is bonded to six equivalent O2- atoms to form corner-sharing RuO6 octahedra. The corner-sharing octahedral tilt angles are 51°. All Ru–O bond lengths are 2.02 Å. In the second Ru4+ site, Ru4+ is bonded to six O2- atoms to form corner-sharing RuO6 octahedra. The corner-sharing octahedra tilt angles range from 50–51°. All Ru–O bond lengths are 2.01 Å. Bi3+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are two shorter (2.30 Å) and six longer (2.51 Å) Bi–O bond lengths. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to three equivalent Dy3+ and one Bi3+ atom to form a mixture of corner and edge-sharing ODy3Bi tetrahedra. In the second O2- site, O2- is bonded to two equivalent Dy3+ and two Ru4+ atoms to form a mixture of distorted corner and edge-sharing ODy2Ru2 tetrahedra. In the third O2- site, O2- is bonded in a 4-coordinate geometry to one Dy3+, two equivalent Ru4+, and one Bi3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on DyBi3(Ru2O7)2 by Materials Project

DyBi3(Ru2O7)2 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Dy3+ is bonded to eight O2- atoms to form distorted DyO8 hexagonal bipyramids that share edges with six equivalent BiO8 hexagonal bipyramids and edges with six equivalent RuO6 octahedra. There are two shorter (2.17 Å) and six longer (2.54 Å) Dy–O bond lengths. There are two inequivalent Ru4+ sites. In the first Ru4+ site, Ru4+ is bonded to six equivalent O2- atoms to form RuO6 octahedra that share corners with six equivalent RuO6 octahedra and edges with six equivalent BiO8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 48°. All Ru–O bond lengths are 2.00 Å. In the second Ru4+ site, Ru4+ is bonded to six O2- atoms to form RuO6 octahedra that share corners with six RuO6 octahedra, edges with two equivalent DyO8 hexagonal bipyramids, and edges with four equivalent BiO8 hexagonal bipyramids. The corner-sharing octahedra tilt angles range from 48–49°. There are four shorter (2.01 Å) and two longer (2.02 Å) Ru–O bond lengths. Bi3+ is bonded to eight O2- atoms to form distorted BiO8 hexagonal bipyramids that share edges with two equivalent DyO8 hexagonal bipyramids, edges with four equivalent BiO8 hexagonal bipyramids, and edges with six RuO6 octahedra. There are a spread of Bi–O bond distances ranging from 2.27–2.55 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to one Dy3+ and three equivalent Bi3+ atoms to form corner-sharing ODyBi3 tetrahedra. In the second O2- site, O2- is bonded in a 4-coordinate geometry to two Ru4+ and two equivalent Bi3+ atoms. In the third O2- site, O2- is bonded in a 4-coordinate geometry to one Dy3+, two equivalent Ru4+, and one Bi3+ atom.

36 MATERIALS SCIENCE↗