Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “MgNb2”

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 MgNb2 by Materials Project

MgNb2 is beta-derived structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Mg is bonded to six equivalent Mg and six equivalent Nb atoms to form MgMg6Nb6 cuboctahedra that share corners with six equivalent MgMg6Nb6 cuboctahedra, corners with twelve equivalent NbMg3Nb9 cuboctahedra, edges with six equivalent MgMg6Nb6 cuboctahedra, edges with twelve equivalent NbMg3Nb9 cuboctahedra, faces with six equivalent MgMg6Nb6 cuboctahedra, and faces with fourteen equivalent NbMg3Nb9 cuboctahedra. All Mg–Mg bond lengths are 2.92 Å. All Mg–Nb bond lengths are 3.10 Å. Nb is bonded to three equivalent Mg and nine equivalent Nb atoms to form NbMg3Nb9 cuboctahedra that share corners with six equivalent MgMg6Nb6 cuboctahedra, corners with nine equivalent NbMg3Nb9 cuboctahedra, edges with six equivalent MgMg6Nb6 cuboctahedra, edges with fifteen equivalent NbMg3Nb9 cuboctahedra, faces with seven equivalent MgMg6Nb6 cuboctahedra, and faces with twelve equivalent NbMg3Nb9 cuboctahedra. There are six shorter (2.92 Å) and three longer (3.09 Å) Nb–Nb bond lengths.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on MgNb2 by Materials Project

MgNb2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Mg is bonded to six equivalent Mg and six equivalent Nb atoms to form distorted MgMg6Nb6 cuboctahedra that share corners with six equivalent MgMg6Nb6 cuboctahedra, corners with twelve equivalent NbMg3Nb9 cuboctahedra, edges with six equivalent MgMg6Nb6 cuboctahedra, edges with twelve equivalent NbMg3Nb9 cuboctahedra, faces with six equivalent MgMg6Nb6 cuboctahedra, and faces with fourteen equivalent NbMg3Nb9 cuboctahedra. There are two shorter (2.77 Å) and four longer (3.05 Å) Mg–Mg bond lengths. There are two shorter (3.05 Å) and four longer (3.12 Å) Mg–Nb bond lengths. Nb is bonded to three equivalent Mg and nine equivalent Nb atoms to form distorted NbMg3Nb9 cuboctahedra that share corners with six equivalent MgMg6Nb6 cuboctahedra, corners with nine equivalent NbMg3Nb9 cuboctahedra, edges with six equivalent MgMg6Nb6 cuboctahedra, edges with fifteen equivalent NbMg3Nb9 cuboctahedra, faces with seven equivalent MgMg6Nb6 cuboctahedra, and faces with twelve equivalent NbMg3Nb9 cuboctahedra. There are a spread of Nb–Nb bond distances ranging from 2.77–3.22 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on MgNb2 by Materials Project

MgNb2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Mg is bonded in a 12-coordinate geometry to four equivalent Mg and eight equivalent Nb atoms. All Mg–Mg bond lengths are 2.86 Å. There are a spread of Mg–Nb bond distances ranging from 3.06–3.41 Å. Nb is bonded in a 8-coordinate geometry to four equivalent Mg and six equivalent Nb atoms. There are two shorter (2.85 Å) and four longer (2.86 Å) Nb–Nb bond lengths.

36 MATERIALS SCIENCE↗