ErBi3 crystallizes in the hexagonal P6_3/mmc space group. Er(1) is bonded to twelve equivalent Bi(1) atoms to form a mixture of face and corner-sharing ErBi12 cuboctahedra. Bi(1) is bonded in a 4-coordinate geometry to four equivalent Er(1) atoms.
ErBi3 crystallizes in the hexagonal P6_3/mmc space group. Er(1) is bonded to twelve equivalent Bi(1) atoms to form a mixture of face and corner-sharing ErBi12 cuboctahedra. There are six shorter (3.41 Å) and six longer (3.55 Å) Er(1)-Bi(1) bond lengths. Bi(1) is bonded in a 4-coordinate geometry to four equivalent Er(1) atoms.