SEARCH · Engineering Papers

Results for “Eu-S-Sm”

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.

3 records

All sources NASA NTRS DOE OSTI

DOE OSTI2020

Materials Data on Sm2EuS4 by Materials Project

EuSm2S4 crystallizes in the tetragonal I-42d space group. The structure is three-dimensional. Eu2+ is bonded to eight equivalent S2- atoms to form distorted EuS8 hexagonal bipyramids that share corners with eight equivalent SmS8 hexagonal bipyramids, edges with four equivalent EuS8 hexagonal bipyramids, and faces with eight equivalent SmS8 hexagonal bipyramids. There are four shorter (2.91 Å) and four longer (3.09 Å) Eu–S bond lengths. Sm3+ is bonded to eight equivalent S2- atoms to form distorted SmS8 hexagonal bipyramids that share corners with four equivalent EuS8 hexagonal bipyramids, corners with four equivalent SmS8 hexagonal bipyramids, edges with four equivalent SmS8 hexagonal bipyramids, faces with four equivalent EuS8 hexagonal bipyramids, and faces with four equivalent SmS8 hexagonal bipyramids. There are a spread of Sm–S bond distances ranging from 2.84–3.06 Å. S2- is bonded to two equivalent Eu2+ and four equivalent Sm3+ atoms to form a mixture of distorted corner, edge, and face-sharing SSm4Eu2 octahedra. The corner-sharing octahedra tilt angles range from 16–50°.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Sm4EuS5 by Materials Project

EuSm4S5 is Caswellsilverite-like structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Eu2+ is bonded to six equivalent S2- atoms to form EuS6 octahedra that share corners with six equivalent SmS6 octahedra, edges with six equivalent EuS6 octahedra, and edges with six equivalent SmS6 octahedra. The corner-sharing octahedral tilt angles are 1°. All Eu–S bond lengths are 2.89 Å. There are two inequivalent Sm2+ sites. In the first Sm2+ site, Sm2+ is bonded to six S2- atoms to form SmS6 octahedra that share corners with three equivalent EuS6 octahedra, corners with three equivalent SmS6 octahedra, edges with three equivalent EuS6 octahedra, and edges with nine SmS6 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are three shorter (2.81 Å) and three longer (2.86 Å) Sm–S bond lengths. In the second Sm2+ site, Sm2+ is bonded to six S2- atoms to form a mixture of edge and corner-sharing SmS6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are three shorter (2.82 Å) and three longer (2.87 Å) Sm–S bond lengths. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded to three equivalent Eu2+ and three equivalent Sm2+ atoms to form a mixture of edge and corner-sharing SSm3Eu3 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. In the second S2- site, S2- is bonded to six equivalent Sm2+ atoms to form a mixture of edge and corner-sharing SSm6 octahedra. The corner-sharing octahedral tilt angles are 2°. In the third S2- site, S2- is bonded to six Sm2+ atoms to form a mixture of edge and corner-sharing SSm6 octahedra. The corner-sharing octahedra tilt angles range from 1–2°.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on SmEuS2 by Materials Project

EuSmS2 is Caswellsilverite-like structured and crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Eu2+ is bonded to six S2- atoms to form EuS6 octahedra that share corners with six equivalent EuS6 octahedra, edges with four equivalent EuS6 octahedra, and edges with eight equivalent SmS6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are two shorter (2.88 Å) and four longer (2.89 Å) Eu–S bond lengths. Sm2+ is bonded to six S2- atoms to form SmS6 octahedra that share corners with six equivalent SmS6 octahedra, edges with four equivalent SmS6 octahedra, and edges with eight equivalent EuS6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are two shorter (2.88 Å) and four longer (2.89 Å) Sm–S bond lengths. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded to two equivalent Eu2+ and four equivalent Sm2+ atoms to form a mixture of corner and edge-sharing SSm4Eu2 octahedra. The corner-sharing octahedral tilt angles are 0°. In the second S2- site, S2- is bonded to four equivalent Eu2+ and two equivalent Sm2+ atoms to form SSm2Eu4 octahedra that share corners with six equivalent SSm2Eu4 octahedra and edges with twelve SSm4Eu2 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗