Search NASA⌕ Search

SEARCH · Search NASA

Results for “F-La”

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 LaF3 by Materials Project

LaF3 is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. La3+ is bonded in a distorted body-centered cubic geometry to fourteen F1- atoms. There are eight shorter (2.54 Å) and six longer (2.93 Å) La–F bond lengths. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a 6-coordinate geometry to six equivalent La3+ and eight equivalent F1- atoms. All F–F bond lengths are 2.54 Å. In the second F1- site, F1- is bonded to four equivalent La3+ and four equivalent F1- atoms to form a mixture of face, edge, and corner-sharing FLa4F4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LaF3 by Materials Project

LaF3 crystallizes in the orthorhombic Cmme space group. The structure is three-dimensional. there are two inequivalent La3+ sites. In the first La3+ site, La3+ is bonded to twelve F1- atoms to form a mixture of face, edge, and corner-sharing LaF12 cuboctahedra. There are a spread of La–F bond distances ranging from 2.53–2.79 Å. In the second La3+ site, La3+ is bonded in a 10-coordinate geometry to ten F1- atoms. There are a spread of La–F bond distances ranging from 2.37–2.92 Å. There are four inequivalent F1- sites. In the first F1- site, F1- is bonded to four La3+ atoms to form a mixture of distorted edge and corner-sharing FLa4 tetrahedra. In the second F1- site, F1- is bonded in a 12-coordinate geometry to four La3+ atoms. In the third F1- site, F1- is bonded in a distorted linear geometry to two equivalent La3+ atoms. In the fourth F1- site, F1- is bonded in a 3-coordinate geometry to four La3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LaF by Materials Project

LaF is Wurtzite structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. La is bonded to five equivalent F atoms to form a mixture of edge and corner-sharing LaF5 trigonal bipyramids. There are three shorter (2.50 Å) and two longer (2.78 Å) La–F bond lengths. F is bonded to five equivalent La atoms to form a mixture of edge and corner-sharing FLa5 trigonal bipyramids.

36 MATERIALS SCIENCE↗