Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Mg-Si-Yb”

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 Yb2MgSi2 by Materials Project

MgYb2Si2 crystallizes in the tetragonal P4/mbm space group. The structure is three-dimensional. Mg2+ is bonded in a square co-planar geometry to four equivalent Si4- atoms. All Mg–Si bond lengths are 2.87 Å. Yb3+ is bonded in a distorted hexagonal planar geometry to six equivalent Si4- atoms. There are two shorter (3.09 Å) and four longer (3.10 Å) Yb–Si bond lengths. Si4- is bonded in a 9-coordinate geometry to two equivalent Mg2+, six equivalent Yb3+, and one Si4- atom. The Si–Si bond length is 2.40 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on YbMgSi by Materials Project

MgYbSi crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Mg2+ is bonded to four equivalent Si4- atoms to form MgSi4 tetrahedra that share corners with eight equivalent MgSi4 tetrahedra, corners with eight equivalent YbSi5 trigonal bipyramids, edges with two equivalent MgSi4 tetrahedra, and edges with six equivalent YbSi5 trigonal bipyramids. There are a spread of Mg–Si bond distances ranging from 2.73–2.82 Å. Yb2+ is bonded to five equivalent Si4- atoms to form distorted YbSi5 trigonal bipyramids that share corners with eight equivalent MgSi4 tetrahedra, corners with eight equivalent YbSi5 trigonal bipyramids, edges with six equivalent MgSi4 tetrahedra, and edges with six equivalent YbSi5 trigonal bipyramids. There are a spread of Yb–Si bond distances ranging from 3.08–3.19 Å. Si4- is bonded in a 9-coordinate geometry to four equivalent Mg2+ and five equivalent Yb2+ atoms.

36 MATERIALS SCIENCE↗