MgEr2S4 crystallizes in the tetragonal I-42d space group. Mg(1) is bonded in a 4-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 in a 6-coordinate geometry to two equivalent Mg(1) and four equivalent Er(1) atoms.
MgEr2S4 crystallizes in the tetragonal I-42d space group. Mg(1) is bonded in a 4-coordinate geometry to eight equivalent S(1) atoms. There are four shorter (2.60 Å) and four longer (3.12 Å) Mg(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 2.68-3.09 Å. S(1) is bonded in a 6-coordinate geometry to two equivalent Mg(1) and four equivalent Er(1) atoms.