Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Al-Na-O”

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 NaAl11O17 by Materials Project

NaAl11O17 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Na1+ is bonded in a 6-coordinate geometry to six equivalent O2- atoms. All Na–O bond lengths are 2.85 Å. There are four inequivalent Al3+ sites. In the first Al3+ site, Al3+ is bonded to six equivalent O2- atoms to form AlO6 octahedra that share corners with six equivalent AlO4 tetrahedra and edges with six equivalent AlO6 octahedra. All Al–O bond lengths are 1.91 Å. In the second Al3+ site, Al3+ is bonded to four O2- atoms to form corner-sharing AlO4 tetrahedra. The corner-sharing octahedra tilt angles range from 54–58°. There is three shorter (1.82 Å) and one longer (1.83 Å) Al–O bond length. In the third Al3+ site, Al3+ is bonded to six O2- atoms to form AlO6 octahedra that share corners with five AlO4 tetrahedra and edges with five AlO6 octahedra. There are a spread of Al–O bond distances ranging from 1.82–2.06 Å. In the fourth Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share corners with six equivalent AlO6 octahedra and a cornercorner with one AlO4 tetrahedra. The corner-sharing octahedral tilt angles are 55°. There is one shorter (1.70 Å) and three longer (1.79 Å) Al–O bond length. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a rectangular see-saw-like geometry to four Al3+ atoms. In the second O2- site, O2- is bonded in a trigonal non-coplanar geometry to three equivalent Al3+ atoms. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+ and three Al3+ atoms. In the fourth O2- site, O2- is bonded in a rectangular see-saw-like geometry to four Al3+ atoms. In the fifth O2- site, O2- is bonded in a linear geometry to two equivalent Al3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na17Al5O16 by Materials Project

Na17Al5O16 crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are nine inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Na–O bond distances ranging from 2.32–2.61 Å. In the second Na1+ site, Na1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Na–O bond distances ranging from 2.35–2.69 Å. In the third Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Na–O bond distances ranging from 2.29–2.68 Å. In the fourth Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Na–O bond distances ranging from 2.29–2.69 Å. In the fifth Na1+ site, Na1+ is bonded in a 3-coordinate geometry to four O2- atoms. There are a spread of Na–O bond distances ranging from 2.27–2.93 Å. In the sixth Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Na–O bond distances ranging from 2.29–2.76 Å. In the seventh Na1+ site, Na1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Na–O bond distances ranging from 2.30–2.71 Å. In the eighth Na1+ site, Na1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Na–O bond distances ranging from 2.24–2.44 Å. In the ninth Na1+ site, Na1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Na–O bond distances ranging from 2.45–2.50 Å. There are three inequivalent Al3+ sites. In the first Al3+ site, Al3+ is bonded to four O2- atoms to form corner-sharing AlO4 tetrahedra. There is three shorter (1.78 Å) and one longer (1.82 Å) Al–O bond length. In the second Al3+ site, Al3+ is bonded to four O2- atoms to form corner-sharing AlO4 tetrahedra. There are a spread of Al–O bond distances ranging from 1.76–1.80 Å. In the third Al3+ site, Al3+ is bonded to four O2- atoms to form corner-sharing AlO4 tetrahedra. There is two shorter (1.76 Å) and two longer (1.80 Å) Al–O bond length. There are nine inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to five Na1+ and one Al3+ atom. In the second O2- site, O2- is bonded in a 6-coordinate geometry to five Na1+ and one Al3+ atom. In the third O2- site, O2- is bonded in a 5-coordinate geometry to four Na1+ and two Al3+ atoms. In the fourth O2- site, O2- is bonded to four Na1+ and two Al3+ atoms to form distorted edge-sharing ONa4Al2 octahedra. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to five Na1+ and one Al3+ atom. In the sixth O2- site, O2- is bonded in a 6-coordinate geometry to five Na1+ and one Al3+ atom. In the seventh O2- site, O2- is bonded in a 6-coordinate geometry to five Na1+ and one Al3+ atom. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to five Na1+ and one Al3+ atom. In the ninth O2- site, O2- is bonded in a 1-coordinate geometry to five Na1+ and one Al3+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NaAlO2 by Materials Project

NaAlO2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Na1+ is bonded to six equivalent O2- atoms to form distorted NaO6 octahedra that share corners with six equivalent AlO6 octahedra, edges with six equivalent NaO6 octahedra, and edges with six equivalent AlO6 octahedra. The corner-sharing octahedral tilt angles are 14°. All Na–O bond lengths are 2.36 Å. Al3+ is bonded to six equivalent O2- atoms to form AlO6 octahedra that share corners with six equivalent NaO6 octahedra, edges with six equivalent NaO6 octahedra, and edges with six equivalent AlO6 octahedra. The corner-sharing octahedral tilt angles are 14°. All Al–O bond lengths are 1.96 Å. O2- is bonded to three equivalent Na1+ and three equivalent Al3+ atoms to form a mixture of corner and edge-sharing ONa3Al3 octahedra. The corner-sharing octahedral tilt angles are 0°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NaAlO2 by Materials Project

NaAlO2 crystallizes in the orthorhombic Pna2_1 space group. The structure is three-dimensional. Na1+ is bonded to four O2- atoms to form distorted NaO4 tetrahedra that share corners with four equivalent NaO4 tetrahedra and corners with eight equivalent AlO4 tetrahedra. There are a spread of Na–O bond distances ranging from 2.34–2.39 Å. Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share corners with four equivalent AlO4 tetrahedra and corners with eight equivalent NaO4 tetrahedra. There are a spread of Al–O bond distances ranging from 1.77–1.79 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent Na1+ and two equivalent Al3+ atoms. In the second O2- site, O2- is bonded to two equivalent Na1+ and two equivalent Al3+ atoms to form distorted corner-sharing ONa2Al2 trigonal pyramids.

36 MATERIALS SCIENCE↗