Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Al-Ge-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.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

4 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on SmAlGe by Materials Project

SmAlGe crystallizes in the tetragonal I4_1md space group. The structure is three-dimensional. Sm is bonded to six equivalent Al and six equivalent Ge atoms to form a mixture of edge and face-sharing SmAl6Ge6 cuboctahedra. All Sm–Al bond lengths are 3.23 Å. There are four shorter (3.22 Å) and two longer (3.26 Å) Sm–Ge bond lengths. There are two inequivalent Al sites. In the first Al site, Al is bonded in a distorted trigonal planar geometry to six equivalent Sm and three equivalent Ge atoms. There are one shorter (2.44 Å) and two longer (2.45 Å) Al–Ge bond lengths. In the second Al site, Al is bonded in a distorted trigonal planar geometry to six equivalent Sm and three equivalent Ge atoms. All Al–Sm bond lengths are 3.23 Å. There are one shorter (2.44 Å) and two longer (2.45 Å) Al–Ge bond lengths. Ge is bonded in a distorted trigonal planar geometry to six equivalent Sm and three equivalent Al atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm2AlGe3 by Materials Project

Sm2AlGe3 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Sm sites. In the first Sm site, Sm is bonded in a 7-coordinate geometry to two equivalent Al and nine Ge atoms. Both Sm–Al bond lengths are 3.43 Å. There are a spread of Sm–Ge bond distances ranging from 3.04–3.35 Å. In the second Sm site, Sm is bonded in a 7-coordinate geometry to three equivalent Al and seven Ge atoms. There are one shorter (3.30 Å) and two longer (3.39 Å) Sm–Al bond lengths. There are a spread of Sm–Ge bond distances ranging from 3.03–3.13 Å. Al is bonded to five Sm and four Ge atoms to form distorted face-sharing AlSm5Ge4 tetrahedra. There are a spread of Al–Ge bond distances ranging from 2.58–2.69 Å. There are three inequivalent Ge sites. In the first Ge site, Ge is bonded in a 7-coordinate geometry to four Sm and three equivalent Al atoms. In the second Ge site, Ge is bonded in a 8-coordinate geometry to six Sm and two equivalent Ge atoms. There are one shorter (2.59 Å) and one longer (2.64 Å) Ge–Ge bond lengths. In the third Ge site, Ge is bonded in a 9-coordinate geometry to six Sm, one Al, and two equivalent Ge atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm2AlGe6 by Materials Project

Sm2AlGe6 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Sm is bonded in a 12-coordinate geometry to two equivalent Al and ten Ge atoms. There are one shorter (3.33 Å) and one longer (3.37 Å) Sm–Al bond lengths. There are a spread of Sm–Ge bond distances ranging from 3.09–3.40 Å. Al is bonded in a 5-coordinate geometry to four equivalent Sm and five Ge atoms. There are a spread of Al–Ge bond distances ranging from 2.51–2.63 Å. There are five inequivalent Ge sites. In the first Ge site, Ge is bonded in a 6-coordinate geometry to two equivalent Sm, one Al, and three Ge atoms. There are a spread of Ge–Ge bond distances ranging from 2.50–2.57 Å. In the second Ge site, Ge is bonded in a 8-coordinate geometry to six equivalent Sm and two Ge atoms. There are one shorter (2.63 Å) and one longer (2.64 Å) Ge–Ge bond lengths. In the third Ge site, Ge is bonded in a 1-coordinate geometry to six equivalent Sm, one Al, and two Ge atoms. The Ge–Ge bond length is 2.54 Å. In the fourth Ge site, Ge is bonded in a 1-coordinate geometry to two equivalent Sm, one Al, and three Ge atoms. The Ge–Ge bond length is 2.52 Å. In the fifth Ge site, Ge is bonded in a 1-coordinate geometry to two equivalent Sm, one Al, and three Ge atoms. The Ge–Ge bond length is 2.51 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sm2Al3Ge4 by Materials Project

Sm2Al3Ge4 crystallizes in the orthorhombic Cmce space group. The structure is three-dimensional. Sm is bonded in a 8-coordinate geometry to eight Ge atoms. There are a spread of Sm–Ge bond distances ranging from 3.11–3.22 Å. There are two inequivalent Al sites. In the first Al site, Al is bonded to six Ge atoms to form distorted corner-sharing AlGe6 octahedra. The corner-sharing octahedral tilt angles are 32°. There are four shorter (2.60 Å) and two longer (2.80 Å) Al–Ge bond lengths. In the second Al site, Al is bonded in a 5-coordinate geometry to five Ge atoms. There are a spread of Al–Ge bond distances ranging from 2.54–2.88 Å. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 7-coordinate geometry to four equivalent Sm and three Al atoms. In the second Ge site, Ge is bonded in a 9-coordinate geometry to four equivalent Sm and five Al atoms.

36 MATERIALS SCIENCE↗