Materials Data on Er3Al2 by Materials Project
Al2Er3 crystallizes in the tetragonal P4_2/mnm space group. The structure is three-dimensional. there are three inequivalent Er sites. In the first Er site, Er is bonded in a distorted square co-planar geometry to four equivalent Al atoms. All Er–Al bond lengths are 3.28 Å. In the second Er site, Er is bonded in a 6-coordinate geometry to six equivalent Al atoms. All Er–Al bond lengths are 3.08 Å. In the third Er site, Er is bonded in a 6-coordinate geometry to six equivalent Al atoms. There are two shorter (3.04 Å) and four longer (3.19 Å) Er–Al bond lengths. Al is bonded in a 10-coordinate geometry to eight Er and two equivalent Al atoms. There are one shorter (2.75 Å) and one longer (2.97 Å) Al–Al bond lengths.
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