Materials Data on NbFe2 by Materials Project
Fe2Nb is Hexagonal Laves structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Nb is bonded in a 12-coordinate geometry to four equivalent Nb and twelve Fe atoms. There are one shorter (2.91 Å) and three longer (2.95 Å) Nb–Nb bond lengths. There are a spread of Nb–Fe bond distances ranging from 2.80–2.84 Å. There are two inequivalent Fe sites. In the first Fe site, Fe is bonded to six equivalent Nb and six equivalent Fe atoms to form a mixture of corner, edge, and face-sharing FeNb6Fe6 cuboctahedra. All Fe–Fe bond lengths are 2.43 Å. In the second Fe site, Fe is bonded to six equivalent Nb and six Fe atoms to form a mixture of corner, edge, and face-sharing FeNb6Fe6 cuboctahedra. There are two shorter (2.34 Å) and two longer (2.44 Å) Fe–Fe bond lengths.