MgSm2(CuO2)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(7), and one O(8) atom. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. In the second Sm site, Sm(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 3-coordinate geometry to one O(2), one O(4), and one O(5) atom. In the second Cu site, Cu(2) is bonded in a 3-coordinate geometry to one O(1), one O(3), and one O(6) atom. In the third Cu site, Cu(3) is bonded in a 3-coordinate geometry to one O(4), one O(6), and one O(7) atom. In the fourth Cu site, Cu(4) is bonded in a 3-coordinate geometry to one O(3), one O(5), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one Sm(1), one Sm(2), and one Cu(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), one Sm(1), one Sm(2), and one Cu(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sm(1), one Sm(2), one Cu(2), and one Cu(4) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sm(1), one Sm(2), one Cu(1), and one Cu(3) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sm(1), one Sm(2), one Cu(1), and one Cu(4) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Sm(1), one Sm(2), one Cu(2), and one Cu(3) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Mg(1), one Sm(1), one Sm(2), and one Cu(3) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Mg(1), one Sm(1), one Sm(2), and one Cu(4) atom.
MgSm2(CuO2)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(7), and one O(8) atom. The Mg(1)-O(1) bond length is 2.06 Å. The Mg(1)-O(2) bond length is 2.06 Å. The Mg(1)-O(7) bond length is 2.06 Å. The Mg(1)-O(8) bond length is 2.06 Å. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. The Sm(1)-O(1) bond length is 2.44 Å. The Sm(1)-O(2) bond length is 2.44 Å. The Sm(1)-O(3) bond length is 2.61 Å. The Sm(1)-O(4) bond length is 2.61 Å. The Sm(1)-O(5) bond length is 2.62 Å. The Sm(1)-O(6) bond length is 2.60 Å. The Sm(1)-O(7) bond length is 2.44 Å. The Sm(1)-O(8) bond length is 2.44 Å. In the second Sm site, Sm(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. The Sm(2)-O(1) bond length is 2.57 Å. The Sm(2)-O(2) bond length is 2.58 Å. The Sm(2)-O(3) bond length is 2.40 Å. The Sm(2)-O(4) bond length is 2.40 Å. The Sm(2)-O(5) bond length is 2.40 Å. The Sm(2)-O(6) bond length is 2.40 Å. The Sm(2)-O(7) bond length is 2.57 Å. The Sm(2)-O(8) bond length is 2.58 Å. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 3-coordinate geometry to one O(2), one O(4), and one O(5) atom. The Cu(1)-O(2) bond length is 1.86 Å. The Cu(1)-O(4) bond length is 1.85 Å. The Cu(1)-O(5) bond length is 1.95 Å. In the second Cu site, Cu(2) is bonded in a 3-coordinate geometry to one O(1), one O(3), and one O(6) atom. The Cu(2)-O(1) bond length is 1.86 Å. The Cu(2)-O(3) bond length is 1.85 Å. The Cu(2)-O(6) bond length is 1.95 Å. In the third Cu site, Cu(3) is bonded in a 3-coordinate geometry to one O(4), one O(6), and one O(7) atom. The Cu(3)-O(4) bond length is 1.95 Å. The Cu(3)-O(6) bond length is 1.85 Å. The Cu(3)-O(7) bond length is 1.86 Å. In the fourth Cu site, Cu(4) is bonded in a 3-coordinate geometry to one O(3), one O(5), and one O(8) atom. The Cu(4)-O(3) bond length is 1.95 Å. The Cu(4)-O(5) bond length is 1.85 Å. The Cu(4)-O(8) bond length is 1.86 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one Sm(1), one Sm(2), and one Cu(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), one Sm(1), one Sm(2), and one Cu(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sm(1), one Sm(2), one Cu(2), and one Cu(4) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sm(1), one Sm(2), one Cu(1), and one Cu(3) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sm(1), one Sm(2), one Cu(1), and one Cu(4) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Sm(1), one Sm(2), one Cu(2), and one Cu(3) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Mg(1), one Sm(1), one Sm(2), and one Cu(3) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Mg(1), one Sm(1), one Sm(2), and one Cu(4) atom.