Search NASA⌕ Search

SEARCH · Search NASA

Results for “Li2FeF4”

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.

7 records
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Li2FeF4 by Materials Project

Li2FeF4 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are four inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to four F1- atoms to form LiF4 tetrahedra that share corners with six FeF6 octahedra, corners with two equivalent LiF4 tetrahedra, and an edgeedge with one LiF4 tetrahedra. The corner-sharing octahedra tilt angles range from 49–78°. There are a spread of Li–F bond distances ranging from 1.88–2.02 Å. In the second Li1+ site, Li1+ is bonded to four F1- atoms to form LiF4 tetrahedra that share corners with six FeF6 octahedra, corners with two equivalent LiF4 tetrahedra, and an edgeedge with one LiF4 tetrahedra. The corner-sharing octahedra tilt angles range from 49–78°. There are a spread of Li–F bond distances ranging from 1.88–2.02 Å. In the third Li1+ site, Li1+ is bonded to four F1- atoms to form LiF4 tetrahedra that share corners with six FeF6 octahedra, corners with two equivalent LiF4 tetrahedra, and an edgeedge with one LiF4 tetrahedra. The corner-sharing octahedra tilt angles range from 49–78°. There are a spread of Li–F bond distances ranging from 1.88–2.02 Å. In the fourth Li1+ site, Li1+ is bonded to four F1- atoms to form LiF4 tetrahedra that share corners with six FeF6 octahedra, corners with two equivalent LiF4 tetrahedra, and an edgeedge with one LiF4 tetrahedra. The corner-sharing octahedra tilt angles range from 49–78°. There are a spread of Li–F bond distances ranging from 1.88–2.02 Å. There are two inequivalent Fe2+ sites. In the first Fe2+ site, Fe2+ is bonded to six F1- atoms to form FeF6 octahedra that share corners with twelve LiF4 tetrahedra and edges with two equivalent FeF6 octahedra. There are a spread of Fe–F bond distances ranging from 2.01–2.18 Å. In the second Fe2+ site, Fe2+ is bonded to six F1- atoms to form FeF6 octahedra that share corners with twelve LiF4 tetrahedra and edges with two equivalent FeF6 octahedra. There are a spread of Fe–F bond distances ranging from 2.01–2.18 Å. There are eight inequivalent F1- sites. In the first F1- site, F1- is bonded in a trigonal planar geometry to two equivalent Li1+ and one Fe2+ atom. In the second F1- site, F1- is bonded to two Li1+ and two equivalent Fe2+ atoms to form a mixture of distorted corner and edge-sharing FLi2Fe2 trigonal pyramids. In the third F1- site, F1- is bonded in a trigonal planar geometry to two equivalent Li1+ and one Fe2+ atom. In the fourth F1- site, F1- is bonded to two Li1+ and two equivalent Fe2+ atoms to form a mixture of distorted corner and edge-sharing FLi2Fe2 trigonal pyramids. In the fifth F1- site, F1- is bonded to two Li1+ and two equivalent Fe2+ atoms to form a mixture of distorted corner and edge-sharing FLi2Fe2 trigonal pyramids. In the sixth F1- site, F1- is bonded in a trigonal planar geometry to two equivalent Li1+ and one Fe2+ atom. In the seventh F1- site, F1- is bonded to two Li1+ and two equivalent Fe2+ atoms to form a mixture of distorted corner and edge-sharing FLi2Fe2 trigonal pyramids. In the eighth F1- site, F1- is bonded in a trigonal planar geometry to two equivalent Li1+ and one Fe2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li2FeF4 by Materials Project

Li2FeF4 crystallizes in the orthorhombic Pna2_1 space group. The structure is three-dimensional. there are two inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to four F1- atoms to form distorted LiF4 trigonal pyramids that share corners with five equivalent FeF6 octahedra and corners with two equivalent LiF4 trigonal pyramids. The corner-sharing octahedra tilt angles range from 38–79°. There are a spread of Li–F bond distances ranging from 1.89–1.95 Å. In the second Li1+ site, Li1+ is bonded in a 4-coordinate geometry to six F1- atoms. There are a spread of Li–F bond distances ranging from 1.89–2.70 Å. Fe2+ is bonded to six F1- atoms to form FeF6 octahedra that share corners with four equivalent FeF6 octahedra and corners with five equivalent LiF4 trigonal pyramids. The corner-sharing octahedral tilt angles are 39°. There are a spread of Fe–F bond distances ranging from 2.07–2.15 Å. There are four inequivalent F1- sites. In the first F1- site, F1- is bonded in a 3-coordinate geometry to one Li1+ and two equivalent Fe2+ atoms. In the second F1- site, F1- is bonded in a 4-coordinate geometry to three Li1+ and one Fe2+ atom. In the third F1- site, F1- is bonded in a 5-coordinate geometry to three Li1+ and two equivalent Fe2+ atoms. In the fourth F1- site, F1- is bonded to three Li1+ and one Fe2+ atom to form distorted corner-sharing FLi3Fe tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li2FeF4 by Materials Project

Li2FeF4 crystallizes in the orthorhombic Pmc2_1 space group. The structure is three-dimensional. there are two inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded in a trigonal planar geometry to three F1- atoms. There is one shorter (1.82 Å) and two longer (1.84 Å) Li–F bond length. In the second Li1+ site, Li1+ is bonded in a trigonal planar geometry to three F1- atoms. There is one shorter (1.82 Å) and two longer (1.84 Å) Li–F bond length. Fe2+ is bonded to six F1- atoms to form edge-sharing FeF6 octahedra. There are a spread of Fe–F bond distances ranging from 2.05–2.14 Å. There are four inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted trigonal planar geometry to one Li1+ and two equivalent Fe2+ atoms. In the second F1- site, F1- is bonded in a trigonal planar geometry to two equivalent Li1+ and one Fe2+ atom. In the third F1- site, F1- is bonded in a trigonal planar geometry to two equivalent Li1+ and one Fe2+ atom. In the fourth F1- site, F1- is bonded in a distorted trigonal planar geometry to one Li1+ and two equivalent Fe2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li2FeF4 by Materials Project

Li2FeF4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded in a distorted see-saw-like geometry to four F1- atoms. There are a spread of Li–F bond distances ranging from 1.86–2.22 Å. In the second Li1+ site, Li1+ is bonded to five F1- atoms to form LiF5 square pyramids that share corners with three equivalent FeF6 octahedra, edges with two equivalent FeF6 octahedra, and an edgeedge with one LiF5 square pyramid. The corner-sharing octahedra tilt angles range from 29–66°. There are a spread of Li–F bond distances ranging from 1.92–2.11 Å. Fe2+ is bonded to six F1- atoms to form distorted FeF6 octahedra that share corners with two equivalent FeF6 octahedra, corners with three equivalent LiF5 square pyramids, an edgeedge with one FeF6 octahedra, and edges with two equivalent LiF5 square pyramids. The corner-sharing octahedral tilt angles are 51°. There are a spread of Fe–F bond distances ranging from 2.04–2.26 Å. There are four inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted rectangular see-saw-like geometry to two Li1+ and two equivalent Fe2+ atoms. In the second F1- site, F1- is bonded in a T-shaped geometry to two Li1+ and one Fe2+ atom. In the third F1- site, F1- is bonded in a distorted see-saw-like geometry to three Li1+ and one Fe2+ atom. In the fourth F1- site, F1- is bonded to two Li1+ and two equivalent Fe2+ atoms to form distorted corner-sharing FLi2Fe2 trigonal pyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li2FeF4 by Materials Project

Li2FeF4 crystallizes in the monoclinic Pc space group. The structure is three-dimensional. there are eight inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to four F1- atoms to form LiF4 tetrahedra that share corners with five FeF6 octahedra, corners with three LiF4 tetrahedra, and a cornercorner with one LiF4 trigonal pyramid. The corner-sharing octahedra tilt angles range from 16–71°. There are a spread of Li–F bond distances ranging from 1.84–1.90 Å. In the second Li1+ site, Li1+ is bonded to four F1- atoms to form LiF4 tetrahedra that share corners with four FeF6 octahedra, corners with two LiF4 tetrahedra, corners with two equivalent LiF4 trigonal pyramids, and an edgeedge with one FeF6 octahedra. The corner-sharing octahedra tilt angles range from 49–65°. There are a spread of Li–F bond distances ranging from 1.84–1.95 Å. In the third Li1+ site, Li1+ is bonded to four F1- atoms to form distorted LiF4 trigonal pyramids that share corners with three FeF6 octahedra, corners with four LiF4 tetrahedra, and edges with two FeF6 octahedra. The corner-sharing octahedra tilt angles range from 52–64°. There are a spread of Li–F bond distances ranging from 1.84–2.00 Å. In the fourth Li1+ site, Li1+ is bonded to four F1- atoms to form LiF4 tetrahedra that share corners with four FeF6 octahedra, corners with three LiF4 tetrahedra, a cornercorner with one LiF4 trigonal pyramid, and an edgeedge with one FeF6 octahedra. The corner-sharing octahedra tilt angles range from 52–83°. There are a spread of Li–F bond distances ranging from 1.84–1.95 Å. In the fifth Li1+ site, Li1+ is bonded to four F1- atoms to form LiF4 tetrahedra that share corners with four FeF6 octahedra, corners with three LiF4 tetrahedra, a cornercorner with one LiF4 trigonal pyramid, and an edgeedge with one FeF6 octahedra. The corner-sharing octahedra tilt angles range from 52–83°. There are a spread of Li–F bond distances ranging from 1.84–1.95 Å. In the sixth Li1+ site, Li1+ is bonded to four F1- atoms to form distorted LiF4 trigonal pyramids that share corners with three FeF6 octahedra, corners with four LiF4 tetrahedra, and edges with two FeF6 octahedra. The corner-sharing octahedra tilt angles range from 52–65°. There are a spread of Li–F bond distances ranging from 1.84–1.99 Å. In the seventh Li1+ site, Li1+ is bonded to four F1- atoms to form LiF4 tetrahedra that share corners with four FeF6 octahedra, corners with two LiF4 tetrahedra, corners with two equivalent LiF4 trigonal pyramids, and an edgeedge with one FeF6 octahedra. The corner-sharing octahedra tilt angles range from 49–65°. There are a spread of Li–F bond distances ranging from 1.84–1.94 Å. In the eighth Li1+ site, Li1+ is bonded to four F1- atoms to form LiF4 tetrahedra that share corners with five FeF6 octahedra, corners with three LiF4 tetrahedra, and a cornercorner with one LiF4 trigonal pyramid. The corner-sharing octahedra tilt angles range from 16–71°. There are a spread of Li–F bond distances ranging from 1.84–1.89 Å. There are four inequivalent Fe2+ sites. In the first Fe2+ site, Fe2+ is bonded to six F1- atoms to form distorted FeF6 octahedra that share corners with four FeF6 octahedra, corners with eight LiF4 tetrahedra, corners with two LiF4 trigonal pyramids, and an edgeedge with one LiF4 trigonal pyramid. The corner-sharing octahedra tilt angles range from 40–64°. There are a spread of Fe–F bond distances ranging from 2.01–2.42 Å. In the second Fe2+ site, Fe2+ is bonded to six F1- atoms to form distorted FeF6 octahedra that share corners with four FeF6 octahedra, corners with five LiF4 tetrahedra, a cornercorner with one LiF4 trigonal pyramid, edges with two LiF4 tetrahedra, and an edgeedge with one LiF4 trigonal pyramid. The corner-sharing octahedra tilt angles range from 40–64°. There are a spread of Fe–F bond distances ranging from 1.99–2.46 Å. In the third Fe2+ site, Fe2+ is bonded to six F1- atoms to form distorted FeF6 octahedra that share corners with four FeF6 octahedra, corners with five LiF4 tetrahedra, a cornercorner with one LiF4 trigonal pyramid, edges with two LiF4 tetrahedra, and an edgeedge with one LiF4 trigonal pyramid. The corner-sharing octahedra tilt angles range from 40–64°. There are a spread of Fe–F bond distances ranging from 1.99–2.45 Å. In the fourth Fe2+ site, Fe2+ is bonded to six F1- atoms to form distorted FeF6 octahedra that share corners with four FeF6 octahedra, corners with eight LiF4 tetrahedra, corners with two LiF4 trigonal pyramids, and an edgeedge with one LiF4 trigonal pyramid. The corner-sharing octahedra tilt angles range from 40–64°. There are a spread of Fe–F bond distances ranging from 2.01–2.43 Å. There are sixteen inequivalent F1- sites. In the first F1- site, F1- is bonded in a trigonal planar geometry to two Li1+ and one Fe2+ atom. In the second F1- site, F1- is bonded in a distorted trigonal planar geometry to two Li1+ and one Fe2+ atom. In the third F1- site, F1- is bonded in a distorted trigonal planar geometry to two Li1+ and one Fe2+ atom. In the fourth F1- site, F1- is bonded in a distorted trigonal pyramidal geometry to two Li1+ and two Fe2+ atoms. In the fifth F1- site, F1- is bonded in a distorted T-shaped geometry to two Li1+ and one Fe2+ atom. In the sixth F1- site, F1- is bonded in a 4-coordinate geometry to two Li1+ and two Fe2+ atoms. In the seventh F1- site, F1- is bonded in a 4-coordinate geometry to two Li1+ and two Fe2+ atoms. In the eighth F1- site, F1- is bonded in a rectangular see-saw-like geometry to two Li1+ and two Fe2+ atoms. In the ninth F1- site, F1- is bonded in a rectangular see-saw-like geometry to two Li1+ and two Fe2+ atoms. In the tenth F1- site, F1- is bonded in a 4-coordinate geometry to two Li1+ and two Fe2+ atoms. In the eleventh F1- site, F1- is bonded in a 4-coordinate geometry to two Li1+ and two Fe2+ atoms. In the twelfth F1- site, F1- is bonded in a distorted T-shaped geometry to two Li1+ and one Fe2+ atom. In the thirteenth F1- site, F1- is bonded in a distorted trigonal pyramidal geometry to two Li1+ and two Fe2+ atoms. In the fourteenth F1- site, F1- is bonded in a distorted trigonal planar geometry to two Li1+ and one Fe2+ atom. In the fifteenth F1- site, F1- is bonded in a distorted trigonal planar geometry to two Li1+ and one Fe2+ atom. In the sixteenth F1- site, F1- is bonded in a trigonal planar geometry to two Li1+ and one Fe2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li2FeF4 by Materials Project

Li2FeF4 crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. there are two inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded in a 4-coordinate geometry to six F1- atoms. There are a spread of Li–F bond distances ranging from 1.91–2.58 Å. In the second Li1+ site, Li1+ is bonded in a 5-coordinate geometry to five F1- atoms. There are a spread of Li–F bond distances ranging from 1.92–2.35 Å. Fe2+ is bonded to six F1- atoms to form corner-sharing FeF6 octahedra. The corner-sharing octahedra tilt angles range from 47–49°. There are a spread of Fe–F bond distances ranging from 2.02–2.14 Å. There are four inequivalent F1- sites. In the first F1- site, F1- is bonded in a 5-coordinate geometry to three Li1+ and two equivalent Fe2+ atoms. In the second F1- site, F1- is bonded to three Li1+ and one Fe2+ atom to form a mixture of distorted corner and edge-sharing FLi3Fe trigonal pyramids. In the third F1- site, F1- is bonded to three Li1+ and one Fe2+ atom to form distorted FLi3Fe trigonal pyramids that share corners with eight FLi3Fe trigonal pyramids and edges with two FLi2Fe2 trigonal pyramids. In the fourth F1- site, F1- is bonded to two Li1+ and two equivalent Fe2+ atoms to form a mixture of distorted corner and edge-sharing FLi2Fe2 trigonal pyramids.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li2FeF4 by Materials Project

Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations

36 MATERIALS SCIENCE↗