Search NASA⌕ Search

SEARCH · Search NASA

Results for “Ce-Ni-Si”

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.

7 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on CeSi2Ni by Materials Project

CeNiSi2 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Ce4+ is bonded in a 10-coordinate geometry to ten Si4- atoms. There are a spread of Ce–Si bond distances ranging from 3.08–3.14 Å. Ni4+ is bonded in a 5-coordinate geometry to five Si4- atoms. There are a spread of Ni–Si bond distances ranging from 2.29–2.34 Å. There are two inequivalent Si4- sites. In the first Si4- site, Si4- is bonded in a 8-coordinate geometry to four equivalent Ce4+ and four equivalent Ni4+ atoms. In the second Si4- site, Si4- is bonded in a 9-coordinate geometry to six equivalent Ce4+, one Ni4+, and two equivalent Si4- atoms. Both Si–Si bond lengths are 2.40 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeSiNi by Materials Project

CeNiSi crystallizes in the tetragonal I4_1md space group. The structure is three-dimensional. Ce3+ is bonded to six equivalent Si4- atoms to form a mixture of distorted corner, edge, and face-sharing CeSi6 pentagonal pyramids. There are four shorter (3.06 Å) and two longer (3.10 Å) Ce–Si bond lengths. Ni1+ is bonded in a trigonal planar geometry to three equivalent Si4- atoms. There are two shorter (2.32 Å) and one longer (2.35 Å) Ni–Si bond lengths. Si4- is bonded in a 9-coordinate geometry to six equivalent Ce3+ and three equivalent Ni1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CeSi4Ni9 by Materials Project

CeNi9Si4 crystallizes in the tetragonal I4/mcm space group. The structure is three-dimensional. Ce3+ is bonded in a 8-coordinate geometry to eight equivalent Si4- atoms. All Ce–Si bond lengths are 3.27 Å. There are three inequivalent Ni+1.44+ sites. In the first Ni+1.44+ site, Ni+1.44+ is bonded in a 4-coordinate geometry to four equivalent Si4- atoms. There are two shorter (2.45 Å) and two longer (2.50 Å) Ni–Si bond lengths. In the second Ni+1.44+ site, Ni+1.44+ is bonded to four equivalent Si4- atoms to form a mixture of distorted edge and corner-sharing NiSi4 tetrahedra. There are a spread of Ni–Si bond distances ranging from 2.29–2.50 Å. In the third Ni+1.44+ site, Ni+1.44+ is bonded in a distorted rectangular see-saw-like geometry to four equivalent Si4- atoms. All Ni–Si bond lengths are 2.31 Å. Si4- is bonded in a 12-coordinate geometry to two equivalent Ce3+, nine Ni+1.44+, and one Si4- atom. The Si–Si bond length is 2.68 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ce(SiNi)2 by Materials Project

CeNi2Si2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Ce4+ is bonded in a distorted body-centered cubic geometry to eight equivalent Si4- atoms. All Ce–Si bond lengths are 3.10 Å. Ni2+ is bonded to four equivalent Si4- atoms to form a mixture of edge and corner-sharing NiSi4 tetrahedra. All Ni–Si bond lengths are 2.33 Å. Si4- is bonded in a 9-coordinate geometry to four equivalent Ce4+, four equivalent Ni2+, and one Si4- atom. The Si–Si bond length is 2.43 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ce3(Si4Ni)2 by Materials Project

Ce3Ni2Si8 crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. there are two inequivalent Ce4+ sites. In the first Ce4+ site, Ce4+ is bonded in a 12-coordinate geometry to sixteen Si2- atoms. There are a spread of Ce–Si bond distances ranging from 3.16–3.28 Å. In the second Ce4+ site, Ce4+ is bonded in a 10-coordinate geometry to ten Si2- atoms. There are a spread of Ce–Si bond distances ranging from 3.08–3.19 Å. Ni2+ is bonded in a 5-coordinate geometry to five Si2- atoms. There are a spread of Ni–Si bond distances ranging from 2.28–2.35 Å. There are four inequivalent Si2- sites. In the first Si2- site, Si2- is bonded in a 8-coordinate geometry to four Ce4+, two equivalent Ni2+, and two equivalent Si2- atoms. Both Si–Si bond lengths are 2.47 Å. In the second Si2- site, Si2- is bonded in a 9-coordinate geometry to six equivalent Ce4+, one Ni2+, and two equivalent Si2- atoms. Both Si–Si bond lengths are 2.44 Å. In the third Si2- site, Si2- is bonded in a 8-coordinate geometry to four Ce4+, two equivalent Ni2+, and two equivalent Si2- atoms. Both Si–Si bond lengths are 2.45 Å. In the fourth Si2- site, Si2- is bonded in a 9-coordinate geometry to four equivalent Ce4+ and five Si2- atoms. The Si–Si bond length is 2.36 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ce3(SiNi3)2 by Materials Project

Ce3Ni6Si2 crystallizes in the cubic Im-3m space group. The structure is three-dimensional. Ce is bonded in a 12-coordinate geometry to eight equivalent Ni and four equivalent Si atoms. There are four shorter (2.80 Å) and four longer (3.03 Å) Ce–Ni bond lengths. All Ce–Si bond lengths are 3.13 Å. Ni is bonded in a 12-coordinate geometry to four equivalent Ce, six equivalent Ni, and two equivalent Si atoms. There are four shorter (2.55 Å) and two longer (2.85 Å) Ni–Ni bond lengths. Both Ni–Si bond lengths are 2.46 Å. Si is bonded to six equivalent Ce and six equivalent Ni atoms to form a mixture of corner and face-sharing SiCe6Ni6 cuboctahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ce6SiNi4 by Materials Project

Ce6Ni4Si crystallizes in the hexagonal P6_3/m space group. The structure is three-dimensional. there are two inequivalent Ce sites. In the first Ce site, Ce is bonded in a 5-coordinate geometry to five Ni atoms. There are a spread of Ce–Ni bond distances ranging from 2.66–2.98 Å. In the second Ce site, Ce is bonded in a 1-coordinate geometry to five equivalent Ni and two equivalent Si atoms. There are a spread of Ce–Ni bond distances ranging from 2.83–3.27 Å. Both Ce–Si bond lengths are 3.01 Å. There are two inequivalent Ni sites. In the first Ni site, Ni is bonded in a 9-coordinate geometry to eight Ce and one Si atom. The Ni–Si bond length is 2.38 Å. In the second Ni site, Ni is bonded in a body-centered cubic geometry to six equivalent Ce and two equivalent Ni atoms. Both Ni–Ni bond lengths are 2.34 Å. Si is bonded in a distorted q6 geometry to six equivalent Ce and three equivalent Ni atoms.

36 MATERIALS SCIENCE↗