Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Np-O-S”

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.

3 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on NpSO by Materials Project

NpOS is Matlockite structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Np4+ is bonded in a 9-coordinate geometry to five equivalent S2- and four equivalent O2- atoms. There are one shorter (2.91 Å) and four longer (2.92 Å) Np–S bond lengths. All Np–O bond lengths are 2.31 Å. S2- is bonded in a 5-coordinate geometry to five equivalent Np4+ atoms. O2- is bonded to four equivalent Np4+ atoms to form a mixture of edge and corner-sharing ONp4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Np(SO6)2 by Materials Project

Np(SO6)2 is Silicon tetrafluoride-derived structured and crystallizes in the orthorhombic Pnma space group. The structure is zero-dimensional and consists of four Np(SO6)2 clusters. Np is bonded in a 4-coordinate geometry to six O atoms. There are a spread of Np–O bond distances ranging from 1.77–2.43 Å. S is bonded in a tetrahedral geometry to four O atoms. There are a spread of S–O bond distances ranging from 1.47–1.51 Å. There are seven inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one S atom. In the second O site, O is bonded in a single-bond geometry to one Np atom. In the third O site, O is bonded in a single-bond geometry to one S atom. In the fourth O site, O is bonded in a distorted bent 150 degrees geometry to one Np and one S atom. In the fifth O site, O is bonded in a single-bond geometry to one Np atom. In the sixth O site, O is bonded in a single-bond geometry to one Np atom. In the seventh O site, O is bonded in a single-bond geometry to one S atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Np2SO2 by Materials Project

Np2SO2 crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Np3+ is bonded in a 7-coordinate geometry to three equivalent S2- and four equivalent O2- atoms. All Np–S bond lengths are 2.76 Å. There are three shorter (2.25 Å) and one longer (2.30 Å) Np–O bond lengths. S2- is bonded to six equivalent Np3+ atoms to form distorted SNp6 octahedra that share corners with twelve equivalent ONp4 tetrahedra, edges with six equivalent SNp6 octahedra, and edges with six equivalent ONp4 tetrahedra. O2- is bonded to four equivalent Np3+ atoms to form ONp4 tetrahedra that share corners with six equivalent SNp6 octahedra, corners with six equivalent ONp4 tetrahedra, edges with three equivalent SNp6 octahedra, and edges with three equivalent ONp4 tetrahedra. The corner-sharing octahedra tilt angles range from 22–51°.

36 MATERIALS SCIENCE↗