MgCe3AlS7 crystallizes in the hexagonal P6_3 space group. Mg(1) is bonded to six equivalent S(3) atoms to form face-sharing MgS6 octahedra. Ce(1) is bonded in a 7-coordinate geometry to one S(2), three equivalent S(1), and three equivalent S(3) atoms. Al(1) is bonded in a tetrahedral geometry to one S(2) and three equivalent S(1) atoms. There are three inequivalent S sites. In the first S site, S(1) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Ce(1) and one Al(1) atom. In the second S site, S(2) is bonded in a distorted tetrahedral geometry to three equivalent Ce(1) and one Al(1) atom. In the third S site, S(3) is bonded in a 5-coordinate geometry to two equivalent Mg(1) and three equivalent Ce(1) atoms.
MgCe3AlS7 crystallizes in the hexagonal P6_3 space group. Mg(1) is bonded to six equivalent S(3) atoms to form face-sharing MgS6 octahedra. There are three shorter (2.57 Å) and three longer (2.62 Å) Mg(1)-S(3) bond lengths. Ce(1) is bonded in a 7-coordinate geometry to one S(2), three equivalent S(1), and three equivalent S(3) atoms. The Ce(1)-S(2) bond length is 2.90 Å. There are a spread of Ce(1)-S(1) bond distances ranging from 2.84-3.02 Å. There are a spread of Ce(1)-S(3) bond distances ranging from 2.91-3.01 Å. Al(1) is bonded in a tetrahedral geometry to one S(2) and three equivalent S(1) atoms. The Al(1)-S(2) bond length is 2.24 Å. All Al(1)-S(1) bond lengths are 2.26 Å. There are three inequivalent S sites. In the first S site, S(1) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Ce(1) and one Al(1) atom. In the second S site, S(2) is bonded in a distorted tetrahedral geometry to three equivalent Ce(1) and one Al(1) atom. In the third S site, S(3) is bonded in a 5-coordinate geometry to two equivalent Mg(1) and three equivalent Ce(1) atoms.