MgFeCu2SnS4 crystallizes in the monoclinic P2 space group. Mg(1) is bonded in a 10-coordinate geometry to two equivalent Fe(1), two equivalent Cu(1), two equivalent Sn(1), two equivalent S(1), and two equivalent S(2) atoms. Fe(1) is bonded in a 6-coordinate geometry to two equivalent Mg(1), two equivalent S(1), and two equivalent S(2) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 6-coordinate geometry to two equivalent Mg(1), two equivalent S(1), and two equivalent S(2) atoms. In the second Cu site, Cu(2) is bonded in a 4-coordinate geometry to two equivalent S(1) and two equivalent S(2) atoms. Sn(1) is bonded in a 6-coordinate geometry to two equivalent Mg(1), two equivalent S(1), and two equivalent S(2) atoms. There are two inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to one Mg(1), one Fe(1), one Cu(1), one Cu(2), and one Sn(1) atom. In the second S site, S(2) is bonded in a 5-coordinate geometry to one Mg(1), one Fe(1), one Cu(1), one Cu(2), and one Sn(1) atom.
MgFeCu2SnS4 crystallizes in the monoclinic P2 space group. Mg(1) is bonded in a 10-coordinate geometry to two equivalent Fe(1), two equivalent Cu(1), two equivalent Sn(1), two equivalent S(1), and two equivalent S(2) atoms. Both Mg(1)-Fe(1) bond lengths are 2.74 Å. There is one shorter (2.71 Å) and one longer (2.72 Å) Mg(1)-Cu(1) bond length. Both Mg(1)-Sn(1) bond lengths are 3.09 Å. Both Mg(1)-S(1) bond lengths are 2.52 Å. Both Mg(1)-S(2) bond lengths are 2.53 Å. Fe(1) is bonded in a 6-coordinate geometry to two equivalent Mg(1), two equivalent S(1), and two equivalent S(2) atoms. Both Fe(1)-S(1) bond lengths are 2.33 Å. Both Fe(1)-S(2) bond lengths are 2.34 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 6-coordinate geometry to two equivalent Mg(1), two equivalent S(1), and two equivalent S(2) atoms. Both Cu(1)-S(1) bond lengths are 2.38 Å. Both Cu(1)-S(2) bond lengths are 2.39 Å. In the second Cu site, Cu(2) is bonded in a 4-coordinate geometry to two equivalent S(1) and two equivalent S(2) atoms. Both Cu(2)-S(1) bond lengths are 2.44 Å. Both Cu(2)-S(2) bond lengths are 2.46 Å. Sn(1) is bonded in a 6-coordinate geometry to two equivalent Mg(1), two equivalent S(1), and two equivalent S(2) atoms. Both Sn(1)-S(1) bond lengths are 2.76 Å. Both Sn(1)-S(2) bond lengths are 2.75 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to one Mg(1), one Fe(1), one Cu(1), one Cu(2), and one Sn(1) atom. In the second S site, S(2) is bonded in a 5-coordinate geometry to one Mg(1), one Fe(1), one Cu(1), one Cu(2), and one Sn(1) atom.