Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Mg-S-Ti”

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(TiS2)8 by Materials Project

Mg(TiS2)8 crystallizes in the orthorhombic Pnnm space group. The structure is three-dimensional. Mg2+ is bonded to six S2- atoms to form MgS6 octahedra that share corners with six TiS6 octahedra and edges with six TiS6 octahedra. The corner-sharing octahedra tilt angles range from 2–4°. There are two shorter (2.52 Å) and four longer (2.53 Å) Mg–S bond lengths. There are four inequivalent Ti+3.75+ sites. In the first Ti+3.75+ site, Ti+3.75+ is bonded to six S2- atoms to form TiS6 octahedra that share an edgeedge with one MgS6 octahedra and edges with six TiS6 octahedra. There are a spread of Ti–S bond distances ranging from 2.39–2.51 Å. In the second Ti+3.75+ site, Ti+3.75+ is bonded to six S2- atoms to form TiS6 octahedra that share corners with two equivalent MgS6 octahedra and edges with six TiS6 octahedra. The corner-sharing octahedral tilt angles are 4°. There are a spread of Ti–S bond distances ranging from 2.38–2.50 Å. In the third Ti+3.75+ site, Ti+3.75+ is bonded to six S2- atoms to form TiS6 octahedra that share edges with two equivalent MgS6 octahedra and edges with six TiS6 octahedra. There are two shorter (2.45 Å) and four longer (2.46 Å) Ti–S bond lengths. In the fourth Ti+3.75+ site, Ti+3.75+ is bonded to six S2- atoms to form TiS6 octahedra that share corners with two equivalent MgS6 octahedra and edges with six TiS6 octahedra. The corner-sharing octahedral tilt angles are 2°. There are two shorter (2.43 Å) and four longer (2.44 Å) Ti–S bond lengths. There are six inequivalent S2- sites. In the first S2- site, S2- is bonded in a distorted T-shaped geometry to three Ti+3.75+ atoms. In the second S2- site, S2- is bonded in a rectangular see-saw-like geometry to one Mg2+ and three Ti+3.75+ atoms. In the third S2- site, S2- is bonded in a distorted T-shaped geometry to three Ti+3.75+ atoms. In the fourth S2- site, S2- is bonded in a distorted T-shaped geometry to three Ti+3.75+ atoms. In the fifth S2- site, S2- is bonded in a rectangular see-saw-like geometry to one Mg2+ and three Ti+3.75+ atoms. In the sixth S2- site, S2- is bonded in a distorted T-shaped geometry to three Ti+3.75+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg(TiS2)4 by Materials Project

Mg(TiS2)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 TiS6 octahedra and edges with six equivalent TiS6 octahedra. The corner-sharing octahedral tilt angles are 1°. All Mg–S bond lengths are 2.53 Å. There are two inequivalent Ti+3.50+ sites. In the first Ti+3.50+ site, Ti+3.50+ is bonded to six equivalent S2- atoms to form TiS6 octahedra that share corners with six equivalent MgS6 octahedra and edges with six equivalent TiS6 octahedra. The corner-sharing octahedral tilt angles are 1°. All Ti–S bond lengths are 2.44 Å. In the second Ti+3.50+ site, Ti+3.50+ is bonded to six S2- atoms to form TiS6 octahedra that share edges with two equivalent MgS6 octahedra and edges with six TiS6 octahedra. There are two shorter (2.45 Å) and four longer (2.47 Å) Ti–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 Ti+3.50+ atoms. In the second S2- site, S2- is bonded in a distorted T-shaped geometry to three equivalent Ti+3.50+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg(TiS2)4 by Materials Project

Mg(TiS2)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 TiS6 octahedra and edges with six equivalent TiS6 octahedra. The corner-sharing octahedral tilt angles are 4°. All Mg–S bond lengths are 2.59 Å. There are two inequivalent Ti+3.50+ sites. In the first Ti+3.50+ site, Ti+3.50+ is bonded to six S2- atoms to form TiS6 octahedra that share edges with two equivalent MgS6 octahedra and edges with six TiS6 octahedra. There are two shorter (2.43 Å) and four longer (2.46 Å) Ti–S bond lengths. In the second Ti+3.50+ site, Ti+3.50+ is bonded to six equivalent S2- atoms to form TiS6 octahedra that share corners with six equivalent MgS6 octahedra and edges with six equivalent TiS6 octahedra. The corner-sharing octahedral tilt angles are 4°. All Ti–S bond lengths are 2.45 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 Ti+3.50+ atoms. In the second S2- site, S2- is bonded in a distorted T-shaped geometry to three equivalent Ti+3.50+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on MgTi2S5 by Materials Project

MgTi2S5 crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. Mg2+ is bonded in a 6-coordinate geometry to eight S2- atoms. There are a spread of Mg–S bond distances ranging from 2.73–3.16 Å. There are two inequivalent Ti4+ sites. In the first Ti4+ site, Ti4+ is bonded to five S2- atoms to form a mixture of edge and corner-sharing TiS5 trigonal bipyramids. There are a spread of Ti–S bond distances ranging from 2.20–2.50 Å. In the second Ti4+ site, Ti4+ is bonded to five S2- atoms to form a mixture of edge and corner-sharing TiS5 trigonal bipyramids. There are a spread of Ti–S bond distances ranging from 2.20–2.50 Å. There are five inequivalent S2- sites. In the first S2- site, S2- is bonded to two equivalent Mg2+ and two Ti4+ atoms to form distorted corner-sharing SMg2Ti2 tetrahedra. In the second S2- site, S2- is bonded in a 3-coordinate geometry to one Mg2+ and three equivalent Ti4+ atoms. In the third S2- site, S2- is bonded in a 3-coordinate geometry to one Mg2+ and three equivalent Ti4+ atoms. In the fourth S2- site, S2- is bonded in a 3-coordinate geometry to two equivalent Mg2+ and one Ti4+ atom. In the fifth S2- site, S2- is bonded in a 3-coordinate geometry to two equivalent Mg2+ and one Ti4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Mg(TiS2)2 by Materials Project

Mg(TiS2)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 TiS6 octahedra. The corner-sharing octahedral tilt angles are 58°. All Mg–S bond lengths are 2.41 Å. Ti3+ is bonded to six equivalent S2- atoms to form TiS6 octahedra that share corners with six equivalent MgS4 tetrahedra and edges with six equivalent TiS6 octahedra. All Ti–S bond lengths are 2.50 Å. S2- is bonded to one Mg2+ and three equivalent Ti3+ atoms to form a mixture of distorted corner and edge-sharing SMgTi3 trigonal pyramids.

36 MATERIALS SCIENCE↗