Materials Data on Er2Al by Materials Project
AlEr2 is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Er sites. In the first Er site, Er is bonded in a 5-coordinate geometry to six equivalent Er and five equivalent Al atoms. There are a spread of Er–Er bond distances ranging from 3.39–3.55 Å. There are a spread of Er–Al bond distances ranging from 3.03–3.44 Å. In the second Er site, Er is bonded in a 3-coordinate geometry to eight Er and five equivalent Al atoms. Both Er–Er bond lengths are 3.35 Å. There are a spread of Er–Al bond distances ranging from 3.14–3.49 Å. Al is bonded in a 10-coordinate geometry to ten Er atoms.
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