Mg(ScSe2)2 crystallizes in the tetragonal I-42d space group. Mg(1) is bonded in a 4-coordinate geometry to eight equivalent Se(1) atoms. Sc(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 Sc(1) atoms.
Mg(ScSe2)2 crystallizes in the tetragonal I-42d space group. Mg(1) is bonded in a 4-coordinate geometry to eight equivalent Se(1) atoms. There are four shorter (2.67 Å) and four longer (3.27 Å) Mg(1)-Se(1) bond lengths. Sc(1) is bonded in a 8-coordinate geometry to eight equivalent Se(1) atoms. There are a spread of Sc(1)-Se(1) bond distances ranging from 2.70-3.22 Å. Se(1) is bonded in a 6-coordinate geometry to two equivalent Mg(1) and four equivalent Sc(1) atoms.