Sr(ErS2)2 crystallizes in the tetragonal I-42d space group. Sr(1) is bonded in a 8-coordinate geometry to eight equivalent S(1) atoms. Er(1) is bonded in a 8-coordinate geometry to eight equivalent S(1) atoms. S(1) is bonded to two equivalent Sr(1) and four equivalent Er(1) atoms to form a mixture of distorted corner, edge, and face-sharing SSr2Er4 octahedra. The corner-sharing octahedral tilt angles range from 16-49°.
Sr(ErS2)2 crystallizes in the tetragonal I-42d space group. Sr(1) is bonded in a 8-coordinate geometry to eight equivalent S(1) atoms. There are four shorter (2.90 Å) and four longer (3.12 Å) Sr(1)-S(1) bond lengths. Er(1) is bonded in a 8-coordinate geometry to eight equivalent S(1) atoms. There are a spread of Er(1)-S(1) bond distances ranging from 2.72-3.16 Å. S(1) is bonded to two equivalent Sr(1) and four equivalent Er(1) atoms to form a mixture of distorted corner, edge, and face-sharing SSr2Er4 octahedra. The corner-sharing octahedral tilt angles range from 16-49°.