Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Nd-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 Nd2Si2O7 by Materials Project

Nd2Si2O7 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. there are two inequivalent Nd3+ sites. In the first Nd3+ site, Nd3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Nd–O bond distances ranging from 2.28–2.69 Å. In the second Nd3+ site, Nd3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Nd–O bond distances ranging from 2.36–2.77 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 1.63–1.65 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 1.62–1.66 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to three Nd3+ and one Si4+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to two Nd3+ and one Si4+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to three Nd3+ and one Si4+ atom. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to two Si4+ atoms. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to two Nd3+ and one Si4+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to three Nd3+ and one Si4+ atom. In the seventh O2- site, O2- is bonded in a 1-coordinate geometry to three Nd3+ and one Si4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Nd2SiO5 by Materials Project

Nd2SiO5 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Nd3+ sites. In the first Nd3+ site, Nd3+ is bonded to seven O2- atoms to form distorted NdO7 hexagonal pyramids that share corners with two equivalent SiO4 tetrahedra, edges with six equivalent NdO7 hexagonal pyramids, and an edgeedge with one SiO4 tetrahedra. There are a spread of Nd–O bond distances ranging from 2.37–2.61 Å. In the second Nd3+ site, Nd3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Nd–O bond distances ranging from 2.40–2.98 Å. Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two equivalent NdO7 hexagonal pyramids and an edgeedge with one NdO7 hexagonal pyramid. There are a spread of Si–O bond distances ranging from 1.62–1.67 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to three Nd3+ and one Si4+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to three equivalent Nd3+ and one Si4+ atom. In the third O2- site, O2- is bonded to four Nd3+ atoms to form a mixture of edge and corner-sharing ONd4 tetrahedra. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to three equivalent Nd3+ and one Si4+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to three equivalent Nd3+ and one Si4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NdSiO4 by Materials Project

NdSiO4 is Zircon structured and crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. Nd is bonded in a 8-coordinate geometry to eight equivalent O atoms. There are four shorter (2.41 Å) and four longer (2.52 Å) Nd–O bond lengths. Si is bonded in a tetrahedral geometry to four equivalent O atoms. All Si–O bond lengths are 1.65 Å. O is bonded in a 1-coordinate geometry to two equivalent Nd and one Si atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Nd5Si3O13 by Materials Project

Nd5Si3O13 crystallizes in the hexagonal P6_3 space group. The structure is three-dimensional. there are three inequivalent Nd+2.80+ sites. In the first Nd+2.80+ site, Nd+2.80+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Nd–O bond distances ranging from 2.30–2.72 Å. In the second Nd+2.80+ site, Nd+2.80+ is bonded in a 6-coordinate geometry to six O2- atoms. There are three shorter (2.42 Å) and three longer (2.50 Å) Nd–O bond lengths. In the third Nd+2.80+ site, Nd+2.80+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Nd–O bond distances ranging from 2.49–2.75 Å. Si4+ is bonded in a tetrahedral geometry to four O2- atoms. There is one shorter (1.64 Å) and three longer (1.65 Å) Si–O bond length. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to three Nd+2.80+ and one Si4+ atom. In the second O2- site, O2- is bonded in a trigonal planar geometry to three equivalent Nd+2.80+ atoms. In the third O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Nd+2.80+ and one Si4+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to three Nd+2.80+ and one Si4+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to three Nd+2.80+ and one Si4+ atom.

36 MATERIALS SCIENCE↗