Materials Data on ErAl by Materials Project

Abstract

ErAl crystallizes in the orthorhombic Pbcm space group. The structure is three-dimensional. there are two inequivalent Er sites. In the first Er site, Er is bonded in a 2-coordinate geometry to eight Al atoms. There are a spread of Er–Al bond distances ranging from 3.06–3.37 Å. In the second Er site, Er is bonded in a 6-coordinate geometry to eight Al atoms. There are a spread of Er–Al bond distances ranging from 3.03–3.54 Å. There are two inequivalent Al sites. In the first Al site, Al is bonded to eight Er and four Al atoms to form a mixture of distorted edge, corner, and face-sharing AlEr8Al4 cuboctahedra. There are two shorter (2.73 Å) and two longer (2.79 Å) Al–Al bond lengths. In the second Al site, Al is bonded in a 10-coordinate geometry to eight Er and two equivalent Al atoms.