Search NASA⌕ Search

SEARCH · Search NASA

Results for “Co-Eu-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.

3 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Eu(CoSi)2 by Materials Project

EuCo2Si2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Eu3+ is bonded in a body-centered cubic geometry to eight equivalent Si4- atoms. All Eu–Si bond lengths are 3.10 Å. Co+2.50+ is bonded to four equivalent Si4- atoms to form a mixture of corner and edge-sharing CoSi4 tetrahedra. All Co–Si bond lengths are 2.30 Å. Si4- is bonded in a 9-coordinate geometry to four equivalent Eu3+, four equivalent Co+2.50+, and one Si4- atom. The Si–Si bond length is 2.66 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2019

Materials Data on Eu2CoSi3 by Materials Project

Eu2CoSi3 is hexagonal omega structure-derived structured and crystallizes in the hexagonal P-6m2 space group. The structure is three-dimensional. Eu is bonded to three equivalent Co and nine Si atoms to form a mixture of edge and face-sharing EuCo3Si9 cuboctahedra. All Eu–Co bond lengths are 3.13 Å. There are three shorter (3.13 Å) and six longer (3.25 Å) Eu–Si bond lengths. Co is bonded in a 9-coordinate geometry to six equivalent Eu and three equivalent Si atoms. All Co–Si bond lengths are 2.31 Å. There are three inequivalent Si sites. In the first Si site, Si is bonded in a 9-coordinate geometry to six equivalent Eu and three equivalent Si atoms. All Si–Si bond lengths are 2.31 Å. In the second Si site, Si is bonded in a 9-coordinate geometry to six equivalent Eu and three equivalent Co atoms. In the third Si site, Si is bonded in a 9-coordinate geometry to six equivalent Eu and three equivalent Si atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on EuCo9Si2 by Materials Project

EuCo9Si2 crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. Eu is bonded in a 8-coordinate geometry to eighteen Co atoms. There are a spread of Eu–Co bond distances ranging from 3.05–3.16 Å. There are two inequivalent Co sites. In the first Co site, Co is bonded in a 6-coordinate geometry to two equivalent Eu, 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 Eu, eight Co, and two equivalent Si atoms to form a mixture of distorted face, edge, and corner-sharing CoEu2Co8Si2 cuboctahedra. There are a spread of Co–Co bond distances ranging from 2.42–2.64 Å. There are one shorter (2.37 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↗