Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Na3(WO3)10”

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 Na3(WO3)10 by Materials Project

Na3(WO3)10 crystallizes in the monoclinic P2/m space group. The structure is three-dimensional. there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to twelve O2- atoms to form NaO12 cuboctahedra that share corners with six NaO12 cuboctahedra and faces with eight WO6 octahedra. There are a spread of Na–O bond distances ranging from 2.72–2.75 Å. In the second Na1+ site, Na1+ is bonded to twelve O2- atoms to form NaO12 cuboctahedra that share corners with four NaO12 cuboctahedra and faces with eight WO6 octahedra. There are a spread of Na–O bond distances ranging from 2.72–2.75 Å. There are six inequivalent W+5.70+ sites. In the first W+5.70+ site, W+5.70+ is bonded to six O2- atoms to form WO6 octahedra that share corners with six WO6 octahedra and faces with three NaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of W–O bond distances ranging from 1.92–1.96 Å. In the second W+5.70+ site, W+5.70+ is bonded to six O2- atoms to form WO6 octahedra that share corners with six WO6 octahedra and faces with two equivalent NaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 2°. All W–O bond lengths are 1.94 Å. In the third W+5.70+ site, W+5.70+ is bonded to six O2- atoms to form WO6 octahedra that share corners with six WO6 octahedra and faces with two equivalent NaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 1–2°. There is three shorter (1.93 Å) and three longer (1.96 Å) W–O bond length. In the fourth W+5.70+ site, W+5.70+ is bonded to six O2- atoms to form WO6 octahedra that share corners with six WO6 octahedra and faces with three NaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 1–2°. There are a spread of W–O bond distances ranging from 1.93–1.97 Å. In the fifth W+5.70+ site, W+5.70+ is bonded to six O2- atoms to form WO6 octahedra that share corners with six WO6 octahedra and faces with two equivalent NaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 2°. There is four shorter (1.94 Å) and two longer (1.95 Å) W–O bond length. In the sixth W+5.70+ site, W+5.70+ is bonded to six O2- atoms to form WO6 octahedra that share corners with six WO6 octahedra and faces with two equivalent NaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–2°. There are a spread of W–O bond distances ranging from 1.92–1.98 Å. There are eleven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted T-shaped geometry to one Na1+ and two W+5.70+ atoms. In the second O2- site, O2- is bonded in a distorted T-shaped geometry to one Na1+ and two W+5.70+ atoms. In the third O2- site, O2- is bonded in a distorted square co-planar geometry to two equivalent Na1+ and two equivalent W+5.70+ atoms. In the fourth O2- site, O2- is bonded in a distorted T-shaped geometry to one Na1+ and two W+5.70+ atoms. In the fifth O2- site, O2- is bonded in a distorted square co-planar geometry to two Na1+ and two W+5.70+ atoms. In the sixth O2- site, O2- is bonded in a distorted T-shaped geometry to one Na1+ and two W+5.70+ atoms. In the seventh O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na1+ and two W+5.70+ atoms. In the eighth O2- site, O2- is bonded in a distorted T-shaped geometry to one Na1+ and two W+5.70+ atoms. In the ninth O2- site, O2- is bonded in a distorted T-shaped geometry to one Na1+ and two W+5.70+ atoms. In the tenth O2- site, O2- is bonded in a distorted T-shaped geometry to one Na1+ and two W+5.70+ atoms. In the eleventh O2- site, O2- is bonded in a linear geometry to two equivalent W+5.70+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na3(WO3)4 by Materials Project

Na3(WO3)4 crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. there are three inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to twelve O2- atoms to form NaO12 cuboctahedra that share corners with eight NaO12 cuboctahedra, faces with four NaO12 cuboctahedra, and faces with eight equivalent WO6 octahedra. There are a spread of Na–O bond distances ranging from 2.66–2.88 Å. In the second Na1+ site, Na1+ is bonded to twelve O2- atoms to form NaO12 cuboctahedra that share corners with eight NaO12 cuboctahedra, faces with four NaO12 cuboctahedra, and faces with eight equivalent WO6 octahedra. There are a spread of Na–O bond distances ranging from 2.69–2.90 Å. In the third Na1+ site, Na1+ is bonded to twelve O2- atoms to form NaO12 cuboctahedra that share corners with eight NaO12 cuboctahedra, faces with four NaO12 cuboctahedra, and faces with eight equivalent WO6 octahedra. There are a spread of Na–O bond distances ranging from 2.67–2.87 Å. W+5.25+ is bonded to six O2- atoms to form WO6 octahedra that share corners with six equivalent WO6 octahedra and faces with six NaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 3–10°. There is four shorter (1.97 Å) and two longer (1.98 Å) W–O bond length. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to three Na1+ and two equivalent W+5.25+ atoms to form a mixture of distorted edge and corner-sharing ONa3W2 square pyramids. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three Na1+ and two equivalent W+5.25+ atoms. In the third O2- site, O2- is bonded in a 5-coordinate geometry to three Na1+ and two equivalent W+5.25+ atoms.

36 MATERIALS SCIENCE↗