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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on LuFeC2 by Materials Project

LuFeC2 crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. Lu3+ is bonded in a 8-coordinate geometry to eight equivalent C3- atoms. There are four shorter (2.55 Å) and four longer (2.63 Å) Lu–C bond lengths. Fe3+ is bonded in a 4-coordinate geometry to four equivalent C3- atoms. There is two shorter (1.91 Å) and two longer (1.98 Å) Fe–C bond length. C3- is bonded in a 7-coordinate geometry to four equivalent Lu3+, two equivalent Fe3+, and one C3- atom. The C–C bond length is 1.41 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Lu2Fe14C by Materials Project

Lu2Fe14C crystallizes in the tetragonal P4_2/mnm space group. The structure is three-dimensional. there are two inequivalent Lu sites. In the first Lu site, Lu is bonded in a 1-coordinate geometry to sixteen Fe and one C atom. There are a spread of Lu–Fe bond distances ranging from 2.98–3.34 Å. The Lu–C bond length is 2.81 Å. In the second Lu site, Lu is bonded in a 12-coordinate geometry to sixteen Fe atoms. There are a spread of Lu–Fe bond distances ranging from 2.93–3.23 Å. There are six inequivalent Fe sites. In the first Fe site, Fe is bonded in a 12-coordinate geometry to three Lu and nine Fe atoms. There are a spread of Fe–Fe bond distances ranging from 2.34–2.74 Å. In the second Fe site, Fe is bonded to two Lu and ten Fe atoms to form a mixture of distorted edge, corner, and face-sharing FeLu2Fe10 cuboctahedra. There are a spread of Fe–Fe bond distances ranging from 2.39–2.60 Å. In the third Fe site, Fe is bonded in a 2-coordinate geometry to two Lu and twelve Fe atoms. There are a spread of Fe–Fe bond distances ranging from 2.71–2.77 Å. In the fourth Fe site, Fe is bonded in a single-bond geometry to two Lu, seven Fe, and one C atom. The Fe–Fe bond length is 2.46 Å. The Fe–C bond length is 1.97 Å. In the fifth Fe site, Fe is bonded to four Lu and eight Fe atoms to form a mixture of distorted corner and face-sharing FeLu4Fe8 cuboctahedra. In the sixth Fe site, Fe is bonded in a water-like geometry to two equivalent Lu, four Fe, and two equivalent C atoms. Both Fe–C bond lengths are 2.01 Å. C is bonded in a 6-coordinate geometry to one Lu and six Fe atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Lu2Fe17C3 by Materials Project

Lu2Fe17C3 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Lu is bonded in a distorted trigonal planar geometry to four Fe and three equivalent C atoms. There are one shorter (3.08 Å) and three longer (3.30 Å) Lu–Fe bond lengths. All Lu–C bond lengths are 2.47 Å. There are four inequivalent Fe sites. In the first Fe site, Fe is bonded in a 2-coordinate geometry to one Lu and thirteen Fe atoms. There are a spread of Fe–Fe bond distances ranging from 2.40–2.71 Å. In the second Fe site, Fe is bonded in a single-bond geometry to four Fe and one C atom. Both Fe–Fe bond lengths are 2.44 Å. The Fe–C bond length is 1.85 Å. In the third Fe site, Fe is bonded in a single-bond geometry to three Fe and one C atom. Both Fe–Fe bond lengths are 2.46 Å. The Fe–C bond length is 1.91 Å. In the fourth Fe site, Fe is bonded to two equivalent Lu and ten Fe atoms to form distorted FeLu2Fe10 cuboctahedra that share corners with four equivalent FeLu2Fe10 cuboctahedra, corners with two equivalent CLu2Fe4 octahedra, faces with four equivalent FeLu2Fe10 cuboctahedra, and faces with four equivalent CLu2Fe4 octahedra. The corner-sharing octahedral tilt angles are 44°. C is bonded to two equivalent Lu and four Fe atoms to form CLu2Fe4 octahedra that share corners with two equivalent FeLu2Fe10 cuboctahedra, corners with four equivalent CLu2Fe4 octahedra, and faces with four equivalent FeLu2Fe10 cuboctahedra. The corner-sharing octahedral tilt angles are 60°.

36 MATERIALS SCIENCE↗