ErCo4In crystallizes in the cubic F-43m space group. Er(1) is bonded in a 16-coordinate geometry to twelve equivalent Co(1) and four equivalent In(1) atoms. Co(1) is bonded to three equivalent Er(1), six equivalent Co(1), and three equivalent In(1) atoms to form a mixture of corner, edge, and face-sharing CoEr3In3Co6 cuboctahedra. In(1) is bonded in a 16-coordinate geometry to four equivalent Er(1) and twelve equivalent Co(1) atoms.
ErCo4In crystallizes in the cubic F-43m space group. Er(1) is bonded in a 16-coordinate geometry to twelve equivalent Co(1) and four equivalent In(1) atoms. All Er(1)-Co(1) bond lengths are 2.91 Å. All Er(1)-In(1) bond lengths are 3.04 Å. Co(1) is bonded to three equivalent Er(1), six equivalent Co(1), and three equivalent In(1) atoms to form a mixture of corner, edge, and face-sharing CoEr3In3Co6 cuboctahedra. There are three shorter (2.48 Å) and three longer (2.49 Å) Co(1)-Co(1) bond lengths. All Co(1)-In(1) bond lengths are 2.91 Å. In(1) is bonded in a 16-coordinate geometry to four equivalent Er(1) and twelve equivalent Co(1) atoms.