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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.

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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on NbV3O10 by Materials Project

NbV3O10 crystallizes in the tetragonal P-4m2 space group. The structure is two-dimensional and consists of one NbV3O10 sheet oriented in the (0, 0, 1) direction. Nb5+ is bonded to four equivalent O2- atoms to form NbO4 tetrahedra that share corners with four equivalent VO5 trigonal bipyramids. All Nb–O bond lengths are 1.87 Å. There are two inequivalent V5+ sites. In the first V5+ site, V5+ is bonded to five O2- atoms to form distorted VO5 trigonal bipyramids that share corners with two equivalent NbO4 tetrahedra and corners with two equivalent VO4 tetrahedra. There are a spread of V–O bond distances ranging from 1.62–1.93 Å. In the second V5+ site, V5+ is bonded to four equivalent O2- atoms to form corner-sharing VO4 tetrahedra. All V–O bond lengths are 1.75 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two V5+ atoms. In the second O2- site, O2- is bonded in a single-bond geometry to one V5+ atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to one Nb5+ and one V5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NbVO4 by Materials Project

Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NbV3O8 by Materials Project

NbV3O8 is beta Vanadium nitride-derived structured and crystallizes in the monoclinic Cc space group. The structure is three-dimensional. Nb5+ is bonded to six O2- atoms to form distorted NbO6 octahedra that share corners with six VO6 octahedra and edges with three VO6 octahedra. The corner-sharing octahedra tilt angles range from 48–55°. There are a spread of Nb–O bond distances ranging from 1.92–2.17 Å. There are three inequivalent V+3.67+ sites. In the first V+3.67+ site, V+3.67+ is bonded to six O2- atoms to form VO6 octahedra that share corners with two equivalent NbO6 octahedra, an edgeedge with one NbO6 octahedra, and edges with four VO6 octahedra. The corner-sharing octahedra tilt angles range from 48–49°. There are a spread of V–O bond distances ranging from 1.83–2.07 Å. In the second V+3.67+ site, V+3.67+ is bonded to six O2- atoms to form VO6 octahedra that share corners with two equivalent NbO6 octahedra, an edgeedge with one NbO6 octahedra, and edges with four VO6 octahedra. The corner-sharing octahedral tilt angles are 55°. There are a spread of V–O bond distances ranging from 1.98–2.09 Å. In the third V+3.67+ site, V+3.67+ is bonded to six O2- atoms to form VO6 octahedra that share corners with two equivalent NbO6 octahedra, an edgeedge with one NbO6 octahedra, and edges with four VO6 octahedra. The corner-sharing octahedra tilt angles range from 50–52°. There are a spread of V–O bond distances ranging from 1.84–2.07 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to one Nb5+ and two V+3.67+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Nb5+ and two V+3.67+ atoms. In the third O2- site, O2- is bonded in a distorted T-shaped geometry to three V+3.67+ atoms. In the fourth O2- site, O2- is bonded in a trigonal non-coplanar geometry to three V+3.67+ atoms. In the fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Nb5+ and two V+3.67+ atoms. In the sixth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Nb5+ and two V+3.67+ atoms. In the seventh O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Nb5+ and two V+3.67+ atoms. In the eighth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Nb5+ and two V+3.67+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NbV3O8 by Materials Project

Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Nb9V2O25 by Materials Project

Nb9V2O25 crystallizes in the tetragonal I4/m space group. The structure is three-dimensional. there are three inequivalent Nb5+ sites. In the first Nb5+ site, Nb5+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are two shorter (1.98 Å) and four longer (2.04 Å) Nb–O bond lengths. In the second Nb5+ site, Nb5+ is bonded to six O2- atoms to form a mixture of distorted corner and edge-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 0–30°. There are a spread of Nb–O bond distances ranging from 1.86–2.35 Å. In the third Nb5+ site, Nb5+ is bonded to six O2- atoms to form distorted NbO6 octahedra that share corners with four NbO6 octahedra, corners with two equivalent VO4 tetrahedra, and edges with two equivalent NbO6 octahedra. The corner-sharing octahedra tilt angles range from 8–30°. There are a spread of Nb–O bond distances ranging from 1.86–2.32 Å. V+2.50+ is bonded to four equivalent O2- atoms to form VO4 tetrahedra that share corners with four equivalent NbO6 octahedra and edges with two equivalent VO4 tetrahedra. The corner-sharing octahedral tilt angles are 47°. All V–O bond lengths are 1.89 Å. There are ten inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one Nb5+ and two equivalent V+2.50+ atoms. In the second O2- site, O2- is bonded in a linear geometry to two Nb5+ atoms. There is one shorter (1.86 Å) and one longer (2.04 Å) O–Nb bond length. In the third O2- site, O2- is bonded in a linear geometry to two equivalent Nb5+ atoms. In the fourth O2- site, O2- is bonded in a linear geometry to two Nb5+ atoms. In the fifth O2- site, O2- is bonded in a linear geometry to two Nb5+ atoms. The O–Nb bond length is 1.86 Å. In the sixth O2- site, O2- is bonded in a linear geometry to two Nb5+ atoms. There is one shorter (1.86 Å) and one longer (2.04 Å) O–Nb bond length. In the seventh O2- site, O2- is bonded in a linear geometry to two Nb5+ atoms. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb5+ atoms. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb5+ atoms. In the tenth O2- site, O2- is bonded in a linear geometry to two Nb5+ atoms.

36 MATERIALS SCIENCE↗