Materials Data on Y2Fe17 by Materials Project

Abstract

Y2Fe17 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Y is bonded in a 10-coordinate geometry to nineteen Fe atoms. There are a spread of Y–Fe bond distances ranging from 3.02–3.26 Å. There are four inequivalent Fe sites. In the first Fe site, Fe is bonded to two equivalent Y and ten Fe atoms to form FeY2Fe10 cuboctahedra that share corners with fourteen FeY2Fe10 cuboctahedra, edges with six equivalent FeY3Fe9 cuboctahedra, and faces with ten FeY2Fe10 cuboctahedra. There are a spread of Fe–Fe bond distances ranging from 2.42–2.60 Å. In the second Fe site, Fe is bonded in a 12-coordinate geometry to two equivalent Y and ten Fe atoms. There are a spread of Fe–Fe bond distances ranging from 2.49–2.76 Å. In the third Fe site, Fe is bonded to three equivalent Y and nine Fe atoms to form a mixture of face, edge, and corner-sharing FeY3Fe9 cuboctahedra. There are two shorter (2.48 Å) and one longer (2.64 Å) Fe–Fe bond lengths. In the fourth Fe site, Fe is bonded in a 2-coordinate geometry to one Y and thirteen Fe atoms. The Fe–Fe bond length is 2.38 Å.