MgSm2Se4 crystallizes in the tetragonal I-42d space group. Mg(1) is bonded in a distorted square co-planar geometry to eight equivalent Se(1) atoms. Sm(1) is bonded in a 8-coordinate geometry to eight equivalent Se(1) atoms. Se(1) is bonded in a 6-coordinate geometry to two equivalent Mg(1) and four equivalent Sm(1) atoms.
MgSm2Se4 crystallizes in the tetragonal I-42d space group. Mg(1) is bonded in a distorted square co-planar geometry to eight equivalent Se(1) atoms. There are four shorter (2.75 Å) and four longer (3.35 Å) Mg(1)-Se(1) bond lengths. Sm(1) is bonded in a 8-coordinate geometry to eight equivalent Se(1) atoms. There are a spread of Sm(1)-Se(1) bond distances ranging from 2.88-3.32 Å. Se(1) is bonded in a 6-coordinate geometry to two equivalent Mg(1) and four equivalent Sm(1) atoms.