Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Na-O-Pt”

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.

8 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on NaPt3O4 by Materials Project

NaPt3O4 crystallizes in the cubic Pm-3n space group. The structure is three-dimensional. Na1+ is bonded in a body-centered cubic geometry to eight equivalent O2- atoms. All Na–O bond lengths are 2.50 Å. Pt+2.33+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Pt–O bond lengths are 2.04 Å. O2- is bonded to two equivalent Na1+ and three equivalent Pt+2.33+ atoms to form a mixture of edge and corner-sharing ONa2Pt3 trigonal bipyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2PtO2 by Materials Project

Na2PtO2 is Corundum-derived structured and crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. Na1+ is bonded to four equivalent O2- atoms to form a mixture of edge and corner-sharing NaO4 trigonal pyramids. There are two shorter (2.35 Å) and two longer (2.38 Å) Na–O bond lengths. Pt2+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Pt–O bond lengths are 2.07 Å. O2- is bonded to four equivalent Na1+ and two equivalent Pt2+ atoms to form a mixture of edge and corner-sharing ONa4Pt2 octahedra. The corner-sharing octahedra tilt angles range from 0–18°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2PtO3 by Materials Project

Na2PtO3 is Caswellsilverite-like structured and crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to six O2- atoms to form NaO6 octahedra that share corners with two equivalent PtO6 octahedra, corners with four NaO6 octahedra, edges with five equivalent PtO6 octahedra, and edges with seven NaO6 octahedra. The corner-sharing octahedra tilt angles range from 0–17°. There are a spread of Na–O bond distances ranging from 2.23–2.58 Å. In the second Na1+ site, Na1+ is bonded to six O2- atoms to form NaO6 octahedra that share corners with two equivalent PtO6 octahedra, corners with four NaO6 octahedra, edges with five equivalent PtO6 octahedra, and edges with seven NaO6 octahedra. The corner-sharing octahedra tilt angles range from 0–17°. There are a spread of Na–O bond distances ranging from 2.31–2.41 Å. Pt4+ is bonded to six O2- atoms to form PtO6 octahedra that share corners with two equivalent PtO6 octahedra, corners with four NaO6 octahedra, edges with two equivalent PtO6 octahedra, and edges with ten NaO6 octahedra. The corner-sharing octahedra tilt angles range from 0–13°. There are a spread of Pt–O bond distances ranging from 2.05–2.23 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to four Na1+ and two equivalent Pt4+ atoms to form a mixture of distorted edge and corner-sharing ONa4Pt2 octahedra. The corner-sharing octahedra tilt angles range from 7–15°. In the second O2- site, O2- is bonded to four Na1+ and two equivalent Pt4+ atoms to form a mixture of edge and corner-sharing ONa4Pt2 octahedra. The corner-sharing octahedra tilt angles range from 4–8°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2PtO3 by Materials Project

Na2PtO3 is Caswellsilverite-like structured and crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are three inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to six O2- atoms to form NaO6 octahedra that share corners with six NaO6 octahedra, edges with six NaO6 octahedra, and edges with six PtO6 octahedra. The corner-sharing octahedral tilt angles are 13°. All Na–O bond lengths are 2.29 Å. In the second Na1+ site, Na1+ is bonded to six O2- atoms to form NaO6 octahedra that share corners with two equivalent NaO6 octahedra, corners with four PtO6 octahedra, edges with four PtO6 octahedra, and edges with eight NaO6 octahedra. The corner-sharing octahedra tilt angles range from 11–13°. There are a spread of Na–O bond distances ranging from 2.33–2.50 Å. In the third Na1+ site, Na1+ is bonded to six O2- atoms to form NaO6 octahedra that share corners with two equivalent NaO6 octahedra, corners with four PtO6 octahedra, edges with four PtO6 octahedra, and edges with eight NaO6 octahedra. The corner-sharing octahedra tilt angles range from 10–13°. There are a spread of Na–O bond distances ranging from 2.30–2.48 Å. There are two inequivalent Pt4+ sites. In the first Pt4+ site, Pt4+ is bonded to six O2- atoms to form PtO6 octahedra that share corners with six NaO6 octahedra, edges with three equivalent PtO6 octahedra, and edges with nine NaO6 octahedra. The corner-sharing octahedra tilt angles range from 10–11°. There are two shorter (2.08 Å) and four longer (2.09 Å) Pt–O bond lengths. In the second Pt4+ site, Pt4+ is bonded to six O2- atoms to form PtO6 octahedra that share corners with six NaO6 octahedra, edges with three equivalent PtO6 octahedra, and edges with nine NaO6 octahedra. The corner-sharing octahedra tilt angles range from 10–11°. All Pt–O bond lengths are 2.09 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to four Na1+ and two Pt4+ atoms to form a mixture of edge and corner-sharing ONa4Pt2 octahedra. The corner-sharing octahedra tilt angles range from 0–9°. In the second O2- site, O2- is bonded to four Na1+ and two Pt4+ atoms to form a mixture of edge and corner-sharing ONa4Pt2 octahedra. The corner-sharing octahedra tilt angles range from 0–9°. In the third O2- site, O2- is bonded to four Na1+ and two Pt4+ atoms to form a mixture of edge and corner-sharing ONa4Pt2 octahedra. The corner-sharing octahedra tilt angles range from 0–7°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2PtO3 by Materials Project

Na2PtO3 is Caswellsilverite-like structured and crystallizes in the orthorhombic Fddd space group. The structure is three-dimensional. there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to six O2- atoms to form NaO6 octahedra that share corners with two equivalent PtO6 octahedra, corners with four NaO6 octahedra, edges with five equivalent PtO6 octahedra, and edges with seven NaO6 octahedra. The corner-sharing octahedra tilt angles range from 10–14°. There are a spread of Na–O bond distances ranging from 2.29–2.39 Å. In the second Na1+ site, Na1+ is bonded to six O2- atoms to form NaO6 octahedra that share corners with two equivalent NaO6 octahedra, corners with four equivalent PtO6 octahedra, edges with four equivalent PtO6 octahedra, and edges with eight NaO6 octahedra. The corner-sharing octahedra tilt angles range from 11–14°. There are a spread of Na–O bond distances ranging from 2.35–2.47 Å. Pt4+ is bonded to six O2- atoms to form PtO6 octahedra that share corners with six NaO6 octahedra, edges with three equivalent PtO6 octahedra, and edges with nine NaO6 octahedra. The corner-sharing octahedra tilt angles range from 10–11°. There are two shorter (2.08 Å) and four longer (2.09 Å) Pt–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to four Na1+ and two equivalent Pt4+ atoms to form a mixture of corner and edge-sharing ONa4Pt2 octahedra. The corner-sharing octahedra tilt angles range from 5–7°. In the second O2- site, O2- is bonded to four Na1+ and two equivalent Pt4+ atoms to form a mixture of corner and edge-sharing ONa4Pt2 octahedra. The corner-sharing octahedra tilt angles range from 5–9°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na4PtO4 by Materials Project

Na4PtO4 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to five O2- atoms to form distorted NaO5 trigonal bipyramids that share corners with two equivalent PtO6 octahedra, edges with three equivalent PtO6 octahedra, and edges with four equivalent NaO5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 14°. There are three shorter (2.29 Å) and two longer (2.53 Å) Na–O bond lengths. In the second Na1+ site, Na1+ is bonded in a distorted see-saw-like geometry to four O2- atoms. There are a spread of Na–O bond distances ranging from 2.23–2.36 Å. Pt4+ is bonded to six O2- atoms to form PtO6 octahedra that share corners with four equivalent NaO5 trigonal bipyramids, edges with two equivalent PtO6 octahedra, and edges with six equivalent NaO5 trigonal bipyramids. There are four shorter (2.11 Å) and two longer (2.12 Å) Pt–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to five Na1+ and one Pt4+ atom to form a mixture of corner and edge-sharing ONa5Pt octahedra. The corner-sharing octahedra tilt angles range from 0–13°. In the second O2- site, O2- is bonded to four Na1+ and two equivalent Pt4+ atoms to form a mixture of distorted corner and edge-sharing ONa4Pt2 octahedra. The corner-sharing octahedra tilt angles range from 0–13°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na3(Pt3O4)4 by Materials Project

Na3(Pt3O4)4 crystallizes in the cubic Fm-3 space group. The structure is three-dimensional. there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a body-centered cubic geometry to eight equivalent O2- atoms. All Na–O bond lengths are 2.48 Å. In the second Na1+ site, Na1+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are four shorter (2.40 Å) and four longer (2.50 Å) Na–O bond lengths. Pt+2.42+ is bonded in a square co-planar geometry to four O2- atoms. There are two shorter (2.02 Å) and two longer (2.04 Å) Pt–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to two Na1+ and three equivalent Pt+2.42+ atoms to form ONa2Pt3 trigonal bipyramids that share corners with seven equivalent ONa2Pt3 trigonal bipyramids, corners with four equivalent ONaPt3 trigonal pyramids, edges with three equivalent ONa2Pt3 trigonal bipyramids, and edges with three equivalent ONaPt3 trigonal pyramids. In the second O2- site, O2- is bonded to one Na1+ and three equivalent Pt+2.42+ atoms to form ONaPt3 trigonal pyramids that share corners with four equivalent ONa2Pt3 trigonal bipyramids, corners with six equivalent ONaPt3 trigonal pyramids, and edges with three equivalent ONa2Pt3 trigonal bipyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2PtO6 by Materials Project

Na2PtO6 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Na is bonded to six O atoms to form distorted NaO6 octahedra that share corners with four equivalent ONa2PtO tetrahedra, edges with three equivalent NaO6 octahedra, and edges with three equivalent PtO6 octahedra. There are a spread of Na–O bond distances ranging from 2.36–2.68 Å. Pt is bonded to six O atoms to form PtO6 octahedra that share corners with four equivalent ONa2PtO tetrahedra and edges with six equivalent NaO6 octahedra. There is two shorter (1.88 Å) and four longer (2.09 Å) Pt–O bond length. There are two inequivalent O sites. In the first O site, O is bonded in a trigonal non-coplanar geometry to two equivalent Na and one Pt atom. In the second O site, O is bonded to two equivalent Na, one Pt, and one O atom to form distorted ONa2PtO tetrahedra that share a cornercorner with one PtO6 octahedra, corners with two equivalent NaO6 octahedra, corners with five equivalent ONa2PtO tetrahedra, and edges with two equivalent ONa2PtO tetrahedra. The corner-sharing octahedra tilt angles range from 45–69°. The O–O bond length is 1.40 Å.

36 MATERIALS SCIENCE↗