Er2Au2In crystallizes in the tetragonal P4/mbm space group. Er(1) is bonded in a 6-coordinate geometry to six equivalent Au(1) and four equivalent In(1) atoms. Au(1) is bonded in a 9-coordinate geometry to six equivalent Er(1), one Au(1), and two equivalent In(1) atoms. In(1) is bonded to eight equivalent Er(1) and four equivalent Au(1) atoms to form a mixture of distorted face and corner-sharing InEr8Au4 cuboctahedra.
Er2Au2In crystallizes in the tetragonal P4/mbm space group. Er(1) is bonded in a 6-coordinate geometry to six equivalent Au(1) and four equivalent In(1) atoms. There are two shorter (2.90 Å) and four longer (3.00 Å) Er(1)-Au(1) bond lengths. All Er(1)-In(1) bond lengths are 3.45 Å. Au(1) is bonded in a 9-coordinate geometry to six equivalent Er(1), one Au(1), and two equivalent In(1) atoms. The Au(1)-Au(1) bond length is 2.85 Å. Both Au(1)-In(1) bond lengths are 3.08 Å. In(1) is bonded to eight equivalent Er(1) and four equivalent Au(1) atoms to form a mixture of distorted face and corner-sharing InEr8Au4 cuboctahedra.