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DOE OSTI · 1701191

Materials Data on Pr2Fe14C by Materials Project

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Abstract

Pr2Fe14C crystallizes in the tetragonal P4_2/mnm space group. The structure is three-dimensional. there are two inequivalent Pr sites. In the first Pr site, Pr is bonded in a 12-coordinate geometry to sixteen Fe atoms. There are a spread of Pr–Fe bond distances ranging from 3.01–3.23 Å. In the second Pr site, Pr is bonded in a 1-coordinate geometry to sixteen Fe and one C atom. There are a spread of Pr–Fe bond distances ranging from 3.03–3.38 Å. The Pr–C bond length is 2.89 Å. There are six inequivalent Fe sites. In the first Fe site, Fe is bonded to two Pr and ten Fe atoms to form a mixture of distorted edge, corner, and face-sharing FePr2Fe10 cuboctahedra. There are a spread of Fe–Fe bond distances ranging from 2.39–2.64 Å. In the second Fe site, Fe is bonded to four Pr and eight Fe atoms to form a mixture of corner and face-sharing FePr4Fe8 cuboctahedra. All Fe–Fe bond lengths are 2.52 Å. In the third Fe site, Fe is bonded in a water-like geometry to two equivalent Pr, four Fe, and two equivalent C atoms. There are two shorter (2.52 Å) and two longer (2.81 Å) Fe–Fe bond lengths. Both Fe–C bond lengths are 2.01 Å. In the fourth Fe site, Fe is bonded in a 2-coordinate geometry to two Pr and twelve Fe atoms. There are a spread of Fe–Fe bond distances ranging from 2.64–2.76 Å. In the fifth Fe site, Fe is bonded in a single-bond geometry to two Pr, seven Fe, and one C atom. The Fe–Fe bond length is 2.57 Å. The Fe–C bond length is 2.02 Å. In the sixth Fe site, Fe is bonded to three Pr and nine Fe atoms to form distorted FePr3Fe9 cuboctahedra that share corners with fourteen FePr2Fe10 cuboctahedra, edges with three FePr3Fe9 cuboctahedra, and faces with twelve FePr2Fe10 cuboctahedra. The Fe–Fe bond length is 2.44 Å. C is bonded in a 6-coordinate geometry to one Pr and six Fe atoms.

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36 MATERIALS SCIENCEC-Fe-Prcrystal structurePr2Fe14C

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2020-06-05. Materials Data on Pr2Fe14C by Materials Project. https://doi.org/10.17188/1701191

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