Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Hf-Mo-Se”

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.

2 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on HfMoSe by Materials Project

HfMoSe is half-Heusler structured and crystallizes in the cubic F-43m space group. The structure is three-dimensional. Hf is bonded in a body-centered cubic geometry to four equivalent Mo and four equivalent Se atoms. All Hf–Mo bond lengths are 2.75 Å. All Hf–Se bond lengths are 2.75 Å. Mo is bonded to four equivalent Hf atoms to form distorted MoHf4 tetrahedra that share corners with four equivalent SeHf4 tetrahedra, corners with twelve equivalent MoHf4 tetrahedra, and edges with six equivalent SeHf4 tetrahedra. Se is bonded to four equivalent Hf atoms to form distorted SeHf4 tetrahedra that share corners with four equivalent MoHf4 tetrahedra, corners with twelve equivalent SeHf4 tetrahedra, and edges with six equivalent MoHf4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf9Mo4Se by Materials Project

Hf9Mo4Se crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. there are two inequivalent Hf sites. In the first Hf site, Hf is bonded in a distorted T-shaped geometry to two equivalent Mo and one Se atom. Both Hf–Mo bond lengths are 2.93 Å. The Hf–Se bond length is 3.17 Å. In the second Hf site, Hf is bonded in a 1-coordinate geometry to four Mo and one Se atom. There are a spread of Hf–Mo bond distances ranging from 2.86–3.10 Å. The Hf–Se bond length is 2.75 Å. There are two inequivalent Mo sites. In the first Mo site, Mo is bonded to six equivalent Hf and six equivalent Mo atoms to form face-sharing MoHf6Mo6 cuboctahedra. All Mo–Mo bond lengths are 2.73 Å. In the second Mo site, Mo is bonded in a 12-coordinate geometry to eight Hf and four Mo atoms. Both Mo–Mo bond lengths are 2.88 Å. Se is bonded in a 9-coordinate geometry to nine Hf atoms.

36 MATERIALS SCIENCE↗