Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Nb-O-Pb”

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 Nb2PbO6 by Materials Project

PbNb2O6 crystallizes in the trigonal R3m space group. The structure is three-dimensional. Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with four equivalent NbO6 octahedra, edges with two equivalent PbO12 cuboctahedra, and an edgeedge with one NbO6 octahedra. The corner-sharing octahedra tilt angles range from 24–41°. There are a spread of Nb–O bond distances ranging from 1.85–2.19 Å. There are three inequivalent Pb2+ sites. In the first Pb2+ site, Pb2+ is bonded to twelve O2- atoms to form PbO12 cuboctahedra that share edges with twelve equivalent NbO6 octahedra. There are a spread of Pb–O bond distances ranging from 2.76–3.06 Å. In the second Pb2+ site, Pb2+ is bonded in a 3-coordinate geometry to three equivalent O2- atoms. All Pb–O bond lengths are 2.33 Å. In the third Pb2+ site, Pb2+ is bonded in a 3-coordinate geometry to three equivalent O2- atoms. All Pb–O bond lengths are 2.32 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Nb5+ atoms. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Nb5+ and one Pb2+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Nb5+ atoms. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Nb5+ and two Pb2+ atoms. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Nb5+ and two Pb2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Nb2Pb3O8 by Materials Project

Pb3Nb2O8 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are six inequivalent Nb5+ sites. In the first Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with two PbO6 octahedra and corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 29–51°. There are a spread of Nb–O bond distances ranging from 1.92–2.11 Å. In the second Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with two PbO6 octahedra and corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 30–53°. There are a spread of Nb–O bond distances ranging from 1.91–2.14 Å. In the third Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with two PbO6 octahedra and corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 30–52°. There are a spread of Nb–O bond distances ranging from 1.93–2.11 Å. In the fourth Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with two equivalent PbO6 octahedra and corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 34–50°. There are a spread of Nb–O bond distances ranging from 1.98–2.07 Å. In the fifth Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with two equivalent PbO6 octahedra and corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 31–50°. There are a spread of Nb–O bond distances ranging from 1.99–2.03 Å. In the sixth Nb5+ site, Nb5+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with two PbO6 octahedra and corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 29–53°. There are a spread of Nb–O bond distances ranging from 1.91–2.13 Å. There are nine inequivalent Pb2+ sites. In the first Pb2+ site, Pb2+ is bonded in a distorted hexagonal planar geometry to six O2- atoms. There are a spread of Pb–O bond distances ranging from 2.43–3.10 Å. In the second Pb2+ site, Pb2+ is bonded in a distorted hexagonal planar geometry to six O2- atoms. There are a spread of Pb–O bond distances ranging from 2.52–3.01 Å. In the third Pb2+ site, Pb2+ is bonded to six O2- atoms to form PbO6 octahedra that share corners with six NbO6 octahedra. The corner-sharing octahedra tilt angles range from 47–52°. There are a spread of Pb–O bond distances ranging from 2.18–2.20 Å. In the fourth Pb2+ site, Pb2+ is bonded to six O2- atoms to form PbO6 octahedra that share corners with six NbO6 octahedra. The corner-sharing octahedra tilt angles range from 49–53°. There are four shorter (2.20 Å) and two longer (2.21 Å) Pb–O bond lengths. In the fifth Pb2+ site, Pb2+ is bonded in a hexagonal planar geometry to six O2- atoms. There are a spread of Pb–O bond distances ranging from 2.60–2.80 Å. In the sixth Pb2+ site, Pb2+ is bonded in a hexagonal planar geometry to six O2- atoms. There are a spread of Pb–O bond distances ranging from 2.58–2.92 Å. In the seventh Pb2+ site, Pb2+ is bonded in a distorted hexagonal planar geometry to six O2- atoms. There are a spread of Pb–O bond distances ranging from 2.53–3.02 Å. In the eighth Pb2+ site, Pb2+ is bonded in a distorted hexagonal planar geometry to six O2- atoms. There are a spread of Pb–O bond distances ranging from 2.45–3.05 Å. In the ninth Pb2+ site, Pb2+ is bonded in a hexagonal planar geometry to six O2- atoms. There are a spread of Pb–O bond distances ranging from 2.72–2.80 Å. There are twenty-four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to one Nb5+ and three Pb2+ atoms. In the second O2- site, O2- is bonded in a 4-coordinate geometry to one Nb5+ and three Pb2+ atoms. In the third O2- site, O2- is bonded in a 4-coordinate geometry to one Nb5+ and three Pb2+ atoms. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to one Nb5+ and three Pb2+ atoms. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to two Nb5+ and two Pb2+ atoms. In the sixth O2- site, O2- is bonded in a 4-coordinate geometry to one Nb5+ and three Pb2+ atoms. In the seventh O2- site, O2- is bonded in a 4-coordinate geometry to one Nb5+ and three Pb2+ atoms. In the eighth O2- site, O2- is bonded in a 2-coordinate geometry to two Nb5+ and two Pb2+ atoms. In the ninth O2- site, O2- is bonded in a 4-coordinate geometry to one Nb5+ and three Pb2+ atoms. In the tenth O2- site, O2- is bonded in a 4-coordinate geometry to one Nb5+ and three Pb2+ atoms. In the eleventh O2- site, O2- is bonded in a 4-coordinate geometry to one Nb5+ and three Pb2+ atoms. In the twelfth O2- site, O2- is bonded in a 4-coordinate geometry to one Nb5+ and three Pb2+ atoms. In the thirteenth O2- site, O2- is bonded in a 4-coordinate geometry to one Nb5+ and three Pb2+ atoms. In the fourteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Nb5+ and two Pb2+ atoms. In the fifteenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Nb5+ and one Pb2+ atom. In the sixteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Nb5+ and two Pb2+ atoms. In the seventeenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Nb5+ and one Pb2+ atom. In the eighteenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Nb5+ and one Pb2+ atom. In the nineteenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Nb5+ and one Pb2+ atom. In the twentieth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Nb5+ and one Pb2+ atom. In the twenty-first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Nb5+ and two Pb2+ atoms. In the twenty-second O2- site, O2- is bonded in a bent 150 degrees geometry to two Nb5+ and one Pb2+ atom. In the twenty-third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Nb5+ and two Pb2+ atoms. In the twenty-fourth O2- site, O2- is bonded in a 4-coordinate geometry to one Nb5+ and three Pb2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Nb2Pb2O7 by Materials Project

Pb2Nb2O7 crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Nb5+ is bonded to six equivalent O2- atoms to form NbO6 octahedra that share corners with six equivalent NbO6 octahedra and edges with six equivalent PbO8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 38°. All Nb–O bond lengths are 2.03 Å. Pb2+ is bonded to eight O2- atoms to form distorted PbO8 hexagonal bipyramids that share edges with six equivalent PbO8 hexagonal bipyramids and edges with six equivalent NbO6 octahedra. There are two shorter (2.35 Å) and six longer (2.81 Å) Pb–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent Pb2+ atoms to form corner-sharing OPb4 tetrahedra. In the second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Nb5+ and two equivalent Pb2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Nb2PbO6 by Materials Project

PbNb2O6 crystallizes in the monoclinic Pm space group. The structure is three-dimensional. there are ten inequivalent Nb5+ sites. In the first Nb5+ site, Nb5+ is bonded to six O2- atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 14–20°. There are a spread of Nb–O bond distances ranging from 1.84–2.42 Å. In the second Nb5+ site, Nb5+ is bonded to six O2- atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 16–39°. There are a spread of Nb–O bond distances ranging from 1.85–2.38 Å. In the third Nb5+ site, Nb5+ is bonded to six O2- atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 15–28°. There are a spread of Nb–O bond distances ranging from 1.84–2.28 Å. In the fourth Nb5+ site, Nb5+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Nb–O bond distances ranging from 1.82–2.39 Å. In the fifth Nb5+ site, Nb5+ is bonded to six O2- atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 1–46°. There are a spread of Nb–O bond distances ranging from 1.86–2.33 Å. In the sixth Nb5+ site, Nb5+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Nb–O bond distances ranging from 1.84–2.50 Å. In the seventh Nb5+ site, Nb5+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 9–38°. There are a spread of Nb–O bond distances ranging from 1.92–2.16 Å. In the eighth Nb5+ site, Nb5+ is bonded to six O2- atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 1–38°. There are a spread of Nb–O bond distances ranging from 1.80–2.36 Å. In the ninth Nb5+ site, Nb5+ is bonded to six O2- atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 16–38°. There are a spread of Nb–O bond distances ranging from 1.88–2.25 Å. In the tenth Nb5+ site, Nb5+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 14–46°. There are a spread of Nb–O bond distances ranging from 1.88–2.19 Å. There are five inequivalent Pb2+ sites. In the first Pb2+ site, Pb2+ is bonded in a 9-coordinate geometry to eight O2- atoms. There are a spread of Pb–O bond distances ranging from 2.49–3.02 Å. In the second Pb2+ site, Pb2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Pb–O bond distances ranging from 2.58–2.87 Å. In the third Pb2+ site, Pb2+ is bonded in a 6-coordinate geometry to three O2- atoms. There are one shorter (2.40 Å) and two longer (2.44 Å) Pb–O bond lengths. In the fourth Pb2+ site, Pb2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Pb–O bond distances ranging from 2.39–2.98 Å. In the fifth Pb2+ site, Pb2+ is bonded in a 12-coordinate geometry to twelve O2- atoms. There are a spread of Pb–O bond distances ranging from 2.45–3.25 Å. There are thirty inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to two equivalent Nb5+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Nb5+ and one Pb2+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to two Nb5+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Nb5+ and one Pb2+ atom. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Nb5+ and two Pb2+ atoms. In the sixth O2- site, O2- is bonded in a distorted linear geometry to two Nb5+ atoms. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to two Nb5+ and two equivalent Pb2+ atoms. In the eighth O2- site, O2- is bonded in a linear geometry to two Nb5+ atoms. In the ninth O2- site, O2- is bonded in a 2-coordinate geometry to two Nb5+ and two equivalent Pb2+ atoms. In the tenth O2- site, O2- is bonded in a 1-coordinate geometry to two Nb5+ and two equivalent Pb2+ atoms. In the eleventh O2- site, O2- is bonded in a 2-coordinate geometry to two Nb5+ and two equivalent Pb2+ atoms. In the twelfth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Nb5+ and one Pb2+ atom. In the thirteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Nb5+ and two Pb2+ atoms. In the fourteenth O2- site, O2- is bonded in a linear geometry to two equivalent Nb5+ atoms. In the fifteenth O2- site, O2- is bonded in a linear geometry to two Nb5+ atoms. In the sixteenth O2- site, O2- is bonded in a linear geometry to two Nb5+ atoms. In the seventeenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Nb5+ atoms. In the eighteenth O2- site, O2- is bonded in a bent 150 degrees geometry to two Nb5+ atoms. In the nineteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Nb5+ and two equivalent Pb2+ atoms. In the twentieth O2- site, O2- is bonded in a 2-coordinate geometry to two Nb5+ and four Pb2+ atoms. In the twenty-first O2- site, O2- is bonded in a 2-coordinate geometry to two Nb5+ and two equivalent Pb2+ atoms. In the twenty-second O2- site, O2- is bonded in a distorted single-bond geometry to two Nb5+ and two equivalent Pb2+ atoms. In the twenty-third O2- site, O2- is bonded to two Nb5+ and two equivalent Pb2+ atoms to form distorted corner-sharing ONb2Pb2 tetrahedra. In the twenty-fourth O2- site, O2- is bonded in a distorted single-bond geometry to two Nb5+ and two equivalent Pb2+ atoms. In the twenty-fifth O2- site, O2- is bonded in a 1-coordinate geometry to two Nb5+ and two equivalent Pb2+ atoms. In the twenty-sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent Nb5+ and one Pb2+ atom. In the twenty-seventh O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Nb5+ and two Pb2+ atoms. In the twenty-eighth O2- site, O2- is bonded in a 4-coordinate geometry to two Nb5+ and two equivalent Pb2+ atoms. In the twenty-ninth O2- site, O2- is bonded in a 2-coordinate geometry to two Nb5+ atoms. In the thirtieth O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Nb5+ and one Pb2+ atom.

36 MATERIALS SCIENCE↗