MgZn4(Se2O5)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 5-coordinate geometry to one O(1), one O(19), one O(5), one O(6), and one O(7) atom. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(14), one O(15), one O(18), one O(19), and one O(6) atom to form a mixture of distorted edge and corner-sharing ZnO5 trigonal bipyramids. In the second Zn site, Zn(2) is bonded to one O(13), one O(16), one O(17), one O(20), one O(5), and one O(8) atom to form edge-sharing ZnO6 octahedra. In the third Zn site, Zn(3) is bonded to one O(10), one O(11), one O(14), one O(15), and one O(19) atom to form a mixture of edge and corner-sharing ZnO5 square pyramids. In the fourth Zn site, Zn(4) is bonded to one O(12), one O(13), one O(16), one O(17), one O(20), and one O(9) atom to form distorted edge-sharing ZnO6 octahedra. There are eight inequivalent Se sites. In the first Se site, Se(1) is bonded in a water-like geometry to one O(19) and one O(2) atom. In the second Se site, Se(2) is bonded in a distorted trigonal non-coplanar geometry to one O(20), one O(5), and one O(6) atom. In the third Se site, Se(3) is bonded in a trigonal non-coplanar geometry to one O(1), one O(17), and one O(7) atom. In the fourth Se site, Se(4) is bonded in a distorted trigonal non-coplanar geometry to one O(18), one O(2), and one O(8) atom. In the fifth Se site, Se(5) is bonded in a distorted trigonal non-coplanar geometry to one O(15), one O(4), and one O(9) atom. In the sixth Se site, Se(6) is bonded in a trigonal non-coplanar geometry to one O(10), one O(16), and one O(3) atom. In the seventh Se site, Se(7) is bonded in a distorted trigonal non-coplanar geometry to one O(11), one O(13), and one O(3) atom. In the eighth Se site, Se(8) is bonded in a distorted trigonal non-coplanar geometry to one O(12), one O(14), and one O(4) atom. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a distorted L-shaped geometry to one Mg(1) and one Se(3) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Se(1) and one Se(4) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Se(6) and one Se(7) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Se(5) and one Se(8) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mg(1), one Zn(2), and one Se(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Zn(1), and one Se(2) atom. In the seventh O site, O(7) is bonded in an L-shaped geometry to one Mg(1) and one Se(3) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Zn(2) and one Se(4) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Zn(4) and one Se(5) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Zn(3) and one Se(6) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Zn(3) and one Se(7) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Zn(4) and one Se(8) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Zn(2), one Zn(4), and one Se(7) atom. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Zn(1), one Zn(3), and one Se(8) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(3), and one Se(5) atom. In the sixteenth O site, O(16) is bonded in a distorted trigonal planar geometry to one Zn(2), one Zn(4), and one Se(6) atom. In the seventeenth O site, O(17) is bonded in a trigonal non-coplanar geometry to one Zn(2), one Zn(4), and one Se(3) atom. In the eighteenth O site, O(18) is bonded in a bent 120 degrees geometry to one Zn(1) and one Se(4) atom. In the nineteenth O site, O(19) is bonded in a distorted trigonal pyramidal geometry to one Mg(1), one Zn(1), one Zn(3), and one Se(1) atom. In the twentieth O site, O(20) is bonded in a distorted trigonal non-coplanar geometry to one Zn(2), one Zn(4), and one Se(2) atom.
MgZn4(Se2O5)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 5-coordinate geometry to one O(1), one O(19), one O(5), one O(6), and one O(7) atom. The Mg(1)-O(1) bond length is 2.35 Å. The Mg(1)-O(19) bond length is 2.05 Å. The Mg(1)-O(5) bond length is 2.00 Å. The Mg(1)-O(6) bond length is 2.05 Å. The Mg(1)-O(7) bond length is 2.10 Å. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(14), one O(15), one O(18), one O(19), and one O(6) atom to form a mixture of distorted edge and corner-sharing ZnO5 trigonal bipyramids. The Zn(1)-O(14) bond length is 2.05 Å. The Zn(1)-O(15) bond length is 2.14 Å. The Zn(1)-O(18) bond length is 2.02 Å. The Zn(1)-O(19) bond length is 2.16 Å. The Zn(1)-O(6) bond length is 2.22 Å. In the second Zn site, Zn(2) is bonded to one O(13), one O(16), one O(17), one O(20), one O(5), and one O(8) atom to form edge-sharing ZnO6 octahedra. The Zn(2)-O(13) bond length is 2.13 Å. The Zn(2)-O(16) bond length is 2.20 Å. The Zn(2)-O(17) bond length is 2.10 Å. The Zn(2)-O(20) bond length is 2.08 Å. The Zn(2)-O(5) bond length is 2.22 Å. The Zn(2)-O(8) bond length is 2.24 Å. In the third Zn site, Zn(3) is bonded to one O(10), one O(11), one O(14), one O(15), and one O(19) atom to form a mixture of edge and corner-sharing ZnO5 square pyramids. The Zn(3)-O(10) bond length is 2.13 Å. The Zn(3)-O(11) bond length is 2.05 Å. The Zn(3)-O(14) bond length is 2.11 Å. The Zn(3)-O(15) bond length is 2.09 Å. The Zn(3)-O(19) bond length is 2.06 Å. In the fourth Zn site, Zn(4) is bonded to one O(12), one O(13), one O(16), one O(17), one O(20), and one O(9) atom to form distorted edge-sharing ZnO6 octahedra. The Zn(4)-O(12) bond length is 2.20 Å. The Zn(4)-O(13) bond length is 2.19 Å. The Zn(4)-O(16) bond length is 2.25 Å. The Zn(4)-O(17) bond length is 2.08 Å. The Zn(4)-O(20) bond length is 2.08 Å. The Zn(4)-O(9) bond length is 2.17 Å. There are eight inequivalent Se sites. In the first Se site, Se(1) is bonded in a water-like geometry to one O(19) and one O(2) atom. The Se(1)-O(19) bond length is 1.94 Å. The Se(1)-O(2) bond length is 1.78 Å. In the second Se site, Se(2) is bonded in a distorted trigonal non-coplanar geometry to one O(20), one O(5), and one O(6) atom. The Se(2)-O(20) bond length is 1.74 Å. The Se(2)-O(5) bond length is 1.75 Å. The Se(2)-O(6) bond length is 1.76 Å. In the third Se site, Se(3) is bonded in a trigonal non-coplanar geometry to one O(1), one O(17), and one O(7) atom. The Se(3)-O(1) bond length is 1.72 Å. The Se(3)-O(17) bond length is 1.78 Å. The Se(3)-O(7) bond length is 1.75 Å. In the fourth Se site, Se(4) is bonded in a distorted trigonal non-coplanar geometry to one O(18), one O(2), and one O(8) atom. The Se(4)-O(18) bond length is 1.72 Å. The Se(4)-O(2) bond length is 1.98 Å. The Se(4)-O(8) bond length is 1.67 Å. In the fifth Se site, Se(5) is bonded in a distorted trigonal non-coplanar geometry to one O(15), one O(4), and one O(9) atom. The Se(5)-O(15) bond length is 1.74 Å. The Se(5)-O(4) bond length is 1.88 Å. The Se(5)-O(9) bond length is 1.70 Å. In the sixth Se site, Se(6) is bonded in a trigonal non-coplanar geometry to one O(10), one O(16), and one O(3) atom. The Se(6)-O(10) bond length is 1.72 Å. The Se(6)-O(16) bond length is 1.71 Å. The Se(6)-O(3) bond length is 1.86 Å. In the seventh Se site, Se(7) is bonded in a distorted trigonal non-coplanar geometry to one O(11), one O(13), and one O(3) atom. The Se(7)-O(11) bond length is 1.71 Å. The Se(7)-O(13) bond length is 1.71 Å. The Se(7)-O(3) bond length is 1.89 Å. In the eighth Se site, Se(8) is bonded in a distorted trigonal non-coplanar geometry to one O(12), one O(14), and one O(4) atom. The Se(8)-O(12) bond length is 1.69 Å. The Se(8)-O(14) bond length is 1.78 Å. The Se(8)-O(4) bond length is 1.83 Å. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a distorted L-shaped geometry to one Mg(1) and one Se(3) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Se(1) and one Se(4) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Se(6) and one Se(7) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Se(5) and one Se(8) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mg(1), one Zn(2), and one Se(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Zn(1), and one Se(2) atom. In the seventh O site, O(7) is bonded in an L-shaped geometry to one Mg(1) and one Se(3) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Zn(2) and one Se(4) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Zn(4) and one Se(5) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Zn(3) and one Se(6) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Zn(3) and one Se(7) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Zn(4) and one Se(8) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Zn(2), one Zn(4), and one Se(7) atom. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Zn(1), one Zn(3), and one Se(8) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Zn(1), one Zn(3), and one Se(5) atom. In the sixteenth O site, O(16) is bonded in a distorted trigonal planar geometry to one Zn(2), one Zn(4), and one Se(6) atom. In the seventeenth O site, O(17) is bonded in a trigonal non-coplanar geometry to one Zn(2), one Zn(4), and one Se(3) atom. In the eighteenth O site, O(18) is bonded in a bent 120 degrees geometry to one Zn(1) and one Se(4) atom. In the nineteenth O site, O(19) is bonded in a distorted trigonal pyramidal geometry to one Mg(1), one Zn(1), one Zn(3), and one Se(1) atom. In the twentieth O site, O(20) is bonded in a distorted trigonal non-coplanar geometry to one Zn(2), one Zn(4), and one Se(2) atom.