Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Mg-S-V”

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.

5 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Mg(VS2)4 by Materials Project

Mg(VS2)4 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Mg2+ is bonded to six equivalent S2- atoms to form MgS6 octahedra that share corners with six equivalent VS6 octahedra and edges with six equivalent VS6 octahedra. The corner-sharing octahedral tilt angles are 2°. All Mg–S bond lengths are 2.51 Å. There are two inequivalent V+3.50+ sites. In the first V+3.50+ site, V+3.50+ is bonded to six equivalent S2- atoms to form VS6 octahedra that share corners with six equivalent MgS6 octahedra and edges with six equivalent VS6 octahedra. The corner-sharing octahedral tilt angles are 2°. All V–S bond lengths are 2.40 Å. In the second V+3.50+ site, V+3.50+ is bonded to six S2- atoms to form VS6 octahedra that share edges with two equivalent MgS6 octahedra and edges with six VS6 octahedra. There are two shorter (2.40 Å) and four longer (2.42 Å) V–S bond lengths. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded in a rectangular see-saw-like geometry to one Mg2+ and three V+3.50+ atoms. In the second S2- site, S2- is bonded in a distorted T-shaped geometry to three equivalent V+3.50+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg(VS2)4 by Materials Project

Mg(VS2)4 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Mg2+ is bonded to six equivalent S2- atoms to form MgS6 octahedra that share corners with six equivalent VS6 octahedra and edges with six equivalent VS6 octahedra. The corner-sharing octahedral tilt angles are 5°. All Mg–S bond lengths are 2.57 Å. There are two inequivalent V+3.50+ sites. In the first V+3.50+ site, V+3.50+ is bonded to six S2- atoms to form VS6 octahedra that share edges with two equivalent MgS6 octahedra and edges with six VS6 octahedra. There are two shorter (2.37 Å) and four longer (2.39 Å) V–S bond lengths. In the second V+3.50+ site, V+3.50+ is bonded to six equivalent S2- atoms to form VS6 octahedra that share corners with six equivalent MgS6 octahedra and edges with six equivalent VS6 octahedra. The corner-sharing octahedral tilt angles are 5°. All V–S bond lengths are 2.38 Å. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded in a rectangular see-saw-like geometry to one Mg2+ and three V+3.50+ atoms. In the second S2- site, S2- is bonded in a distorted T-shaped geometry to three equivalent V+3.50+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on MgV2S5 by Materials Project

MgV2S5 crystallizes in the orthorhombic Pmmn space group. The structure is three-dimensional. Mg2+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of Mg–S bond distances ranging from 2.63–2.98 Å. V4+ is bonded to five S2- atoms to form a mixture of corner and edge-sharing VS5 trigonal bipyramids. There are a spread of V–S bond distances ranging from 2.13–2.42 Å. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded to two equivalent Mg2+ and two equivalent V4+ atoms to form distorted corner-sharing SMg2V2 tetrahedra. In the second S2- site, S2- is bonded in a 4-coordinate geometry to one Mg2+ and three equivalent V4+ atoms. In the third S2- site, S2- is bonded in a 3-coordinate geometry to two equivalent Mg2+ and one V4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg(VS2)2 by Materials Project

Mg(VS2)2 is Spinel structured and crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. Mg2+ is bonded to four equivalent S2- atoms to form MgS4 tetrahedra that share corners with twelve equivalent VS6 octahedra. The corner-sharing octahedra tilt angles range from 53–62°. All Mg–S bond lengths are 2.43 Å. V3+ is bonded to six equivalent S2- atoms to form VS6 octahedra that share corners with six equivalent MgS4 tetrahedra and edges with six equivalent VS6 octahedra. There are four shorter (2.45 Å) and two longer (2.46 Å) V–S bond lengths. S2- is bonded in a rectangular see-saw-like geometry to one Mg2+ and three equivalent V3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg(VS2)2 by Materials Project

Mg(VS2)2 is Spinel structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Mg2+ is bonded to four equivalent S2- atoms to form MgS4 tetrahedra that share corners with twelve equivalent VS6 octahedra. The corner-sharing octahedral tilt angles are 59°. All Mg–S bond lengths are 2.43 Å. V3+ is bonded to six equivalent S2- atoms to form VS6 octahedra that share corners with six equivalent MgS4 tetrahedra and edges with six equivalent VS6 octahedra. All V–S bond lengths are 2.46 Å. S2- is bonded to one Mg2+ and three equivalent V3+ atoms to form a mixture of distorted edge and corner-sharing SMgV3 trigonal pyramids.

36 MATERIALS SCIENCE↗