MgCoCu2SnS4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 4-coordinate geometry to one Cu(1), one Cu(2), two equivalent Sn(1), one S(1), one S(2), one S(3), and one S(4) atom. Co(1) is bonded in a distorted tetrahedral geometry to one S(1), one S(2), one S(3), and one S(4) atom. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 5-coordinate geometry to one Mg(1), one S(1), one S(2), one S(3), and one S(4) atom. In the second Cu site, Cu(2) is bonded in a 5-coordinate geometry to one Mg(1), one S(1), one S(2), one S(3), and one S(4) atom. Sn(1) is bonded in a 6-coordinate geometry to two equivalent Mg(1), one S(1), one S(2), one S(3), and one S(4) atom. There are four inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to one Mg(1), one Co(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 Co(1), one Cu(1), one Cu(2), and one Sn(1) atom. In the third S site, S(3) is bonded in a 5-coordinate geometry to one Mg(1), one Co(1), one Cu(1), one Cu(2), and one Sn(1) atom. In the fourth S site, S(4) is bonded in a 5-coordinate geometry to one Mg(1), one Co(1), one Cu(1), one Cu(2), and one Sn(1) atom.
MgCoCu2SnS4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 4-coordinate geometry to one Cu(1), one Cu(2), two equivalent Sn(1), one S(1), one S(2), one S(3), and one S(4) atom. The Mg(1)-Cu(1) bond length is 2.80 Å. The Mg(1)-Cu(2) bond length is 2.79 Å. Both Mg(1)-Sn(1) bond lengths are 3.15 Å. The Mg(1)-S(1) bond length is 2.47 Å. The Mg(1)-S(2) bond length is 2.47 Å. The Mg(1)-S(3) bond length is 2.47 Å. The Mg(1)-S(4) bond length is 2.47 Å. Co(1) is bonded in a distorted tetrahedral geometry to one S(1), one S(2), one S(3), and one S(4) atom. The Co(1)-S(1) bond length is 2.28 Å. The Co(1)-S(2) bond length is 2.27 Å. The Co(1)-S(3) bond length is 2.28 Å. The Co(1)-S(4) bond length is 2.27 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 5-coordinate geometry to one Mg(1), one S(1), one S(2), one S(3), and one S(4) atom. The Cu(1)-S(1) bond length is 2.39 Å. The Cu(1)-S(2) bond length is 2.42 Å. The Cu(1)-S(3) bond length is 2.39 Å. The Cu(1)-S(4) bond length is 2.42 Å. In the second Cu site, Cu(2) is bonded in a 5-coordinate geometry to one Mg(1), one S(1), one S(2), one S(3), and one S(4) atom. The Cu(2)-S(1) bond length is 2.43 Å. The Cu(2)-S(2) bond length is 2.38 Å. The Cu(2)-S(3) bond length is 2.43 Å. The Cu(2)-S(4) bond length is 2.38 Å. Sn(1) is bonded in a 6-coordinate geometry to two equivalent Mg(1), one S(1), one S(2), one S(3), and one S(4) atom. The Sn(1)-S(1) bond length is 2.83 Å. The Sn(1)-S(2) bond length is 2.82 Å. The Sn(1)-S(3) bond length is 2.82 Å. The Sn(1)-S(4) bond length is 2.83 Å. There are four inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to one Mg(1), one Co(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 Co(1), one Cu(1), one Cu(2), and one Sn(1) atom. In the third S site, S(3) is bonded in a 5-coordinate geometry to one Mg(1), one Co(1), one Cu(1), one Cu(2), and one Sn(1) atom. In the fourth S site, S(4) is bonded in a 5-coordinate geometry to one Mg(1), one Co(1), one Cu(1), one Cu(2), and one Sn(1) atom.