Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Ce-O-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.

4 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on CeSiO4 by Materials Project

CeSiO4 is Zircon structured and crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. Ce4+ is bonded in a 8-coordinate geometry to eight equivalent O2- atoms. There are four shorter (2.32 Å) and four longer (2.43 Å) Ce–O bond lengths. Si4+ is bonded in a tetrahedral geometry to four equivalent O2- atoms. All Si–O bond lengths are 1.65 Å. O2- is bonded in a 1-coordinate geometry to two equivalent Ce4+ and one Si4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ce10Si8O3 by Materials Project

Ce10Si8O3 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. there are three inequivalent Ce3+ sites. In the first Ce3+ site, Ce3+ is bonded in a distorted bent 150 degrees geometry to six Si3- and two equivalent O2- atoms. There are four shorter (3.15 Å) and two longer (3.16 Å) Ce–Si bond lengths. Both Ce–O bond lengths are 2.74 Å. In the second Ce3+ site, Ce3+ is bonded in a distorted linear geometry to four Si3- and two equivalent O2- atoms. There are two shorter (2.95 Å) and two longer (3.06 Å) Ce–Si bond lengths. Both Ce–O bond lengths are 2.25 Å. In the third Ce3+ site, Ce3+ is bonded to twelve equivalent Si3- atoms to form face-sharing CeSi12 cuboctahedra. All Ce–Si bond lengths are 3.26 Å. There are two inequivalent Si3- sites. In the first Si3- site, Si3- is bonded in a 9-coordinate geometry to nine Ce3+ atoms. In the second Si3- site, Si3- is bonded in a 9-coordinate geometry to seven Ce3+ and two equivalent Si3- atoms. Both Si–Si bond lengths are 2.36 Å. O2- is bonded to six Ce3+ atoms to form corner-sharing OCe6 octahedra. The corner-sharing octahedra tilt angles range from 0–29°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ce2Si2O7 by Materials Project

Ce2Si2O7 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Ce3+ sites. In the first Ce3+ site, Ce3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ce–O bond distances ranging from 2.29–2.70 Å. In the second Ce3+ site, Ce3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ce–O bond distances ranging from 2.43–2.80 Å. There are two inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form corner-sharing SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.64–1.66 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form corner-sharing SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.64–1.67 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to two Si4+ atoms. In the second O2- site, O2- is bonded in a 1-coordinate geometry to three Ce3+ and one Si4+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to three Ce3+ and one Si4+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two Ce3+ and one Si4+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to three Ce3+ and one Si4+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to two Ce3+ and one Si4+ atom. In the seventh O2- site, O2- is bonded in a 1-coordinate geometry to three Ce3+ and one Si4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ce2Si2O7 by Materials Project

Ce2Si2O7 crystallizes in the tetragonal P4_1 space group. The structure is three-dimensional. there are four inequivalent Ce3+ sites. In the first Ce3+ site, Ce3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Ce–O bond distances ranging from 2.43–3.06 Å. In the second Ce3+ site, Ce3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Ce–O bond distances ranging from 2.39–2.94 Å. In the third Ce3+ site, Ce3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Ce–O bond distances ranging from 2.44–2.74 Å. In the fourth Ce3+ site, Ce3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ce–O bond distances ranging from 2.37–2.98 Å. There are four inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form corner-sharing SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.61–1.68 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form corner-sharing SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.62–1.67 Å. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form corner-sharing SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.62–1.68 Å. In the fourth Si4+ site, Si4+ is bonded to four O2- atoms to form corner-sharing SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.62–1.68 Å. There are fourteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ce3+ and one Si4+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ce3+ and one Si4+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to three Ce3+ and one Si4+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to three Ce3+ and one Si4+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ce3+ and two Si4+ atoms. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to two Ce3+ and one Si4+ atom. In the seventh O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two Ce3+ and one Si4+ atom. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to two Ce3+ and one Si4+ atom. In the ninth O2- site, O2- is bonded in a 1-coordinate geometry to three Ce3+ and one Si4+ atom. In the tenth O2- site, O2- is bonded in a 2-coordinate geometry to one Ce3+ and two Si4+ atoms. In the eleventh O2- site, O2- is bonded in a 1-coordinate geometry to three Ce3+ and one Si4+ atom. In the twelfth O2- site, O2- is bonded in a 1-coordinate geometry to three Ce3+ and one Si4+ atom. In the thirteenth O2- site, O2- is bonded in a 1-coordinate geometry to three Ce3+ and one Si4+ atom. In the fourteenth O2- site, O2- is bonded in a 1-coordinate geometry to three Ce3+ and one Si4+ atom.

36 MATERIALS SCIENCE↗