Search NASA⌕ Search

SEARCH · Search NASA

Results for “Co-Si-Th”

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 ThCo9Si2 by Materials Project

ThCo9Si2 crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. Th is bonded in a 8-coordinate geometry to eighteen Co atoms. There are a spread of Th–Co bond distances ranging from 3.05–3.14 Å. There are two inequivalent Co sites. In the first Co site, Co is bonded in a 6-coordinate geometry to two equivalent Th, eight equivalent Co, and four equivalent Si atoms. All Co–Co bond lengths are 2.63 Å. All Co–Si bond lengths are 2.56 Å. In the second Co site, Co is bonded to two equivalent Th, eight Co, and two equivalent Si atoms to form a mixture of distorted corner, edge, and face-sharing CoTh2Co8Si2 cuboctahedra. There are a spread of Co–Co bond distances ranging from 2.41–2.63 Å. There are one shorter (2.35 Å) and one longer (2.38 Å) Co–Si bond lengths. Si is bonded in a 10-coordinate geometry to ten Co atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Th(CoSi)2 by Materials Project

ThCo2Si2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Th4+ is bonded in a distorted body-centered cubic geometry to eight equivalent Si4- atoms. All Th–Si bond lengths are 3.13 Å. Co2+ is bonded to four equivalent Si4- atoms to form a mixture of edge and corner-sharing CoSi4 tetrahedra. All Co–Si bond lengths are 2.31 Å. Si4- is bonded in a 9-coordinate geometry to four equivalent Th4+, four equivalent Co2+, and one Si4- atom. The Si–Si bond length is 2.58 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ThCoSi by Materials Project

ThCoSi is hexagonal omega structure-derived structured and crystallizes in the tetragonal I4_1md space group. The structure is three-dimensional. there are four inequivalent Th sites. In the first Th site, Th is bonded to six equivalent Co and six equivalent Si atoms to form a mixture of face and edge-sharing ThCo6Si6 cuboctahedra. There are two shorter (2.97 Å) and four longer (3.16 Å) Th–Co bond lengths. There are four shorter (3.08 Å) and two longer (3.12 Å) Th–Si bond lengths. In the second Th site, Th is bonded to six Co and six equivalent Si atoms to form a mixture of face and edge-sharing ThCo6Si6 cuboctahedra. There are two shorter (2.97 Å) and four longer (3.16 Å) Th–Co bond lengths. There are four shorter (3.08 Å) and two longer (3.12 Å) Th–Si bond lengths. In the third Th site, Th is bonded to six Co and six equivalent Si atoms to form a mixture of face and edge-sharing ThCo6Si6 cuboctahedra. There are two shorter (2.97 Å) and four longer (3.16 Å) Th–Co bond lengths. There are four shorter (3.08 Å) and two longer (3.12 Å) Th–Si bond lengths. In the fourth Th site, Th is bonded to six Co and six equivalent Si atoms to form a mixture of face and edge-sharing ThCo6Si6 cuboctahedra. There are two shorter (2.97 Å) and four longer (3.16 Å) Th–Co bond lengths. There are four shorter (3.08 Å) and two longer (3.12 Å) Th–Si bond lengths. There are three inequivalent Co sites. In the first Co site, Co is bonded in a 9-coordinate geometry to six Th and three equivalent Si atoms. There are two shorter (2.32 Å) and one longer (2.34 Å) Co–Si bond lengths. In the second Co site, Co is bonded in a 9-coordinate geometry to six Th and three equivalent Si atoms. There are two shorter (2.32 Å) and one longer (2.34 Å) Co–Si bond lengths. In the third Co site, Co is bonded in a 9-coordinate geometry to six Th and three equivalent Si atoms. There are two shorter (2.32 Å) and one longer (2.34 Å) Co–Si bond lengths. Si is bonded in a 9-coordinate geometry to six Th and three Co atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Th2CoSi3 by Materials Project

Th2CoSi3 crystallizes in the orthorhombic Imm2 space group. The structure is three-dimensional. there are two inequivalent Th4+ sites. In the first Th4+ site, Th4+ is bonded in a 8-coordinate geometry to eight Si4- atoms. There are a spread of Th–Si bond distances ranging from 3.03–3.12 Å. In the second Th4+ site, Th4+ is bonded in a 10-coordinate geometry to ten Si4- atoms. There are eight shorter (3.14 Å) and two longer (3.22 Å) Th–Si bond lengths. Co4+ is bonded in a trigonal planar geometry to three Si4- atoms. There are one shorter (2.27 Å) and two longer (2.32 Å) Co–Si bond lengths. There are three inequivalent Si4- sites. In the first Si4- site, Si4- is bonded in a 9-coordinate geometry to six Th4+, two equivalent Co4+, and one Si4- atom. The Si–Si bond length is 2.39 Å. In the second Si4- site, Si4- is bonded in a 9-coordinate geometry to six Th4+, one Co4+, and two equivalent Si4- atoms. Both Si–Si bond lengths are 2.40 Å. In the third Si4- site, Si4- is bonded in a 9-coordinate geometry to six Th4+ and three Si4- atoms.

36 MATERIALS SCIENCE↗