Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “Fe-Rb-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 RbFe2Se3 by Materials Project

RbFe2Se3 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Rb1+ is bonded in a 10-coordinate geometry to ten Se2- atoms. There are a spread of Rb–Se bond distances ranging from 3.59–4.05 Å. Fe+2.50+ is bonded to four Se2- atoms to form a mixture of edge and corner-sharing FeSe4 tetrahedra. There are two shorter (2.35 Å) and two longer (2.44 Å) Fe–Se bond lengths. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a 6-coordinate geometry to four equivalent Rb1+ and two equivalent Fe+2.50+ atoms. In the second Se2- site, Se2- is bonded in a 6-coordinate geometry to two equivalent Rb1+ and four equivalent Fe+2.50+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on RbFeSe2 by Materials Project

RbFeSe2 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Rb1+ is bonded to eight equivalent Se2- atoms to form distorted RbSe8 hexagonal bipyramids that share corners with four equivalent RbSe8 hexagonal bipyramids, corners with six equivalent FeSe4 tetrahedra, edges with six equivalent RbSe8 hexagonal bipyramids, edges with five equivalent FeSe4 tetrahedra, and faces with two equivalent RbSe8 hexagonal bipyramids. There are a spread of Rb–Se bond distances ranging from 3.59–3.75 Å. Fe3+ is bonded to four equivalent Se2- atoms to form FeSe4 tetrahedra that share corners with six equivalent RbSe8 hexagonal bipyramids, edges with five equivalent RbSe8 hexagonal bipyramids, and edges with two equivalent FeSe4 tetrahedra. There are two shorter (2.33 Å) and two longer (2.34 Å) Fe–Se bond lengths. Se2- is bonded in a 6-coordinate geometry to four equivalent Rb1+ and two equivalent Fe3+ atoms.

36 MATERIALS SCIENCE↗