Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Co-La-S”

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.

2 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on La3Co2S7 by Materials Project

La3Co2S7 crystallizes in the hexagonal P6_3 space group. The structure is three-dimensional. La3+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of La–S bond distances ranging from 2.82–3.45 Å. There are two inequivalent Co+2.50+ sites. In the first Co+2.50+ site, Co+2.50+ is bonded to six equivalent S2- atoms to form face-sharing CoS6 octahedra. There are three shorter (2.34 Å) and three longer (2.36 Å) Co–S bond lengths. In the second Co+2.50+ site, Co+2.50+ is bonded in a tetrahedral geometry to four S2- atoms. There are one shorter (2.21 Å) and three longer (2.23 Å) Co–S bond lengths. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded in a 6-coordinate geometry to four equivalent La3+ and two equivalent Co+2.50+ atoms. In the second S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to three equivalent La3+ and one Co+2.50+ atom. In the third S2- site, S2- is bonded in a distorted tetrahedral geometry to three equivalent La3+ and one Co+2.50+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on La4CoS7 by Materials Project

La4CoS7 crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. there are four inequivalent La3+ sites. In the first La3+ site, La3+ is bonded in a 7-coordinate geometry to seven S2- atoms. There are a spread of La–S bond distances ranging from 2.77–3.21 Å. In the second La3+ site, La3+ is bonded in a 7-coordinate geometry to seven S2- atoms. There are a spread of La–S bond distances ranging from 2.77–3.21 Å. In the third La3+ site, La3+ is bonded to seven S2- atoms to form distorted corner-sharing LaS7 pentagonal bipyramids. There are a spread of La–S bond distances ranging from 2.76–3.20 Å. In the fourth La3+ site, La3+ is bonded in a rectangular see-saw-like geometry to four S2- atoms. There are one shorter (2.70 Å) and three longer (2.74 Å) La–S bond lengths. Co2+ is bonded in a 6-coordinate geometry to six S2- atoms. There are a spread of Co–S bond distances ranging from 2.30–3.14 Å. There are seven inequivalent S2- sites. In the first S2- site, S2- is bonded in a 5-coordinate geometry to three La3+ and two equivalent Co2+ atoms. In the second S2- site, S2- is bonded in a 4-coordinate geometry to three La3+ and two equivalent Co2+ atoms. In the third S2- site, S2- is bonded in a 5-coordinate geometry to three La3+ and two equivalent Co2+ atoms. In the fourth S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to four La3+ atoms. In the fifth S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to four La3+ atoms. In the sixth S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to four La3+ atoms. In the seventh S2- site, S2- is bonded in a tetrahedral geometry to four La3+ atoms.

36 MATERIALS SCIENCE↗