Materials Data on YErAl6 by Materials Project

Abstract

ErYAl6 crystallizes in the trigonal R3m space group. The structure is three-dimensional. there are three inequivalent Er sites. In the first Er site, Er is bonded to twelve Al atoms to form ErAl12 cuboctahedra that share corners with six equivalent ErAl12 cuboctahedra, faces with three equivalent ErAl12 cuboctahedra, and faces with five YAl12 cuboctahedra. There are a spread of Er–Al bond distances ranging from 3.07–3.12 Å. In the second Er site, Er is bonded to twelve Al atoms to form ErAl12 cuboctahedra that share corners with six equivalent ErAl12 cuboctahedra, a faceface with one ErAl12 cuboctahedra, and faces with seven YAl12 cuboctahedra. There are a spread of Er–Al bond distances ranging from 3.07–3.12 Å. In the third Er site, Er is bonded to twelve Al atoms to form distorted ErAl12 cuboctahedra that share corners with three equivalent YAl12 cuboctahedra, corners with six equivalent ErAl12 cuboctahedra, faces with three equivalent YAl12 cuboctahedra, and faces with four ErAl12 cuboctahedra. There are six shorter (3.01 Å) and six longer (3.13 Å) Er–Al bond lengths. There are three inequivalent Y sites. In the first Y site, Y is bonded to twelve Al atoms to form distorted YAl12 cuboctahedra that share corners with nine YAl12 cuboctahedra, faces with three equivalent YAl12 cuboctahedra, and faces with four ErAl12 cuboctahedra. There are a spread of Y–Al bond distances ranging from 3.02–3.13 Å. In the second Y site, Y is bonded to twelve Al atoms to form distorted YAl12 cuboctahedra that share corners with nine YAl12 cuboctahedra and faces with seven ErAl12 cuboctahedra. There are six shorter (3.02 Å) and six longer (3.13 Å) Y–Al bond lengths. In the third Y site, Y is bonded to twelve Al atoms to form distorted YAl12 cuboctahedra that share corners with three equivalent ErAl12 cuboctahedra, corners with six equivalent YAl12 cuboctahedra, faces with three equivalent YAl12 cuboctahedra, and faces with four ErAl12 cuboctahedra. There are six shorter (3.03 Å) and six longer (3.13 Å) Y–Al bond lengths. There are six inequivalent Al sites. In the first Al site, Al is bonded in a 10-coordinate geometry to two Er, two equivalent Y, and six Al atoms. There are a spread of Al–Al bond distances ranging from 2.74–2.88 Å. In the second Al site, Al is bonded in a 10-coordinate geometry to one Er, three Y, and six Al atoms. There are a spread of Al–Al bond distances ranging from 2.73–2.87 Å. In the third Al site, Al is bonded in a 10-coordinate geometry to three Er, one Y, and six Al atoms. There are two shorter (2.73 Å) and two longer (2.87 Å) Al–Al bond lengths. In the fourth Al site, Al is bonded in a 10-coordinate geometry to one Er, three Y, and six Al atoms. There are two shorter (2.73 Å) and two longer (2.87 Å) Al–Al bond lengths. In the fifth Al site, Al is bonded in a 12-coordinate geometry to three Er, one Y, and four Al atoms. In the sixth Al site, Al is bonded in a 12-coordinate geometry to two equivalent Er, two Y, and four Al atoms.