Er4Sb3 crystallizes in the cubic I-43d space group. Er(1) is bonded in a 6-coordinate geometry to six equivalent Sb(1) atoms. Sb(1) is bonded to eight equivalent Er(1) atoms to form a mixture of distorted face, corner, and edge-sharing SbEr8 hexagonal bipyramids.
Er4Sb3 crystallizes in the cubic I-43d space group. Er(1) is bonded in a 6-coordinate geometry to six equivalent Sb(1) atoms. There are three shorter (3.04 Å) and three longer (3.25 Å) Er(1)-Sb(1) bond lengths. Sb(1) is bonded to eight equivalent Er(1) atoms to form a mixture of distorted face, corner, and edge-sharing SbEr8 hexagonal bipyramids.