Mg(BiO2)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a distorted see-saw-like geometry to one O(1), one O(2), one O(3), and one O(7) atom. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(1), one O(2), one O(4), one O(5), one O(7), and one O(8) atom to form distorted edge-sharing BiO6 octahedra. In the second Bi site, Bi(2) is bonded in a trigonal non-coplanar geometry to one O(2), one O(6), and one O(8) atom. In the third Bi site, Bi(3) is bonded to one O(1), one O(3), one O(4), one O(5), one O(6), and one O(8) atom to form edge-sharing BiO6 octahedra. In the fourth Bi site, Bi(4) is bonded to one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom to form distorted edge-sharing BiO6 octahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Bi(1), and one Bi(3) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), one Bi(1), one Bi(2), and one Bi(4) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Mg(1), one Bi(3), and one Bi(4) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Bi(1), one Bi(3), and one Bi(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Bi(1), one Bi(3), and one Bi(4) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Bi(2), one Bi(3), and one Bi(4) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Bi(1), and one Bi(4) atom. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Bi(1), one Bi(2), and one Bi(3) atom.
Mg(BiO2)4 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a distorted see-saw-like geometry to one O(1), one O(2), one O(3), and one O(7) atom. The Mg(1)-O(1) bond length is 2.10 Å. The Mg(1)-O(2) bond length is 2.01 Å. The Mg(1)-O(3) bond length is 2.11 Å. The Mg(1)-O(7) bond length is 2.11 Å. There are four inequivalent Bi sites. In the first Bi site, Bi(1) is bonded to one O(1), one O(2), one O(4), one O(5), one O(7), and one O(8) atom to form distorted edge-sharing BiO6 octahedra. The Bi(1)-O(1) bond length is 2.35 Å. The Bi(1)-O(2) bond length is 2.76 Å. The Bi(1)-O(4) bond length is 2.42 Å. The Bi(1)-O(5) bond length is 2.40 Å. The Bi(1)-O(7) bond length is 2.20 Å. The Bi(1)-O(8) bond length is 2.46 Å. In the second Bi site, Bi(2) is bonded in a trigonal non-coplanar geometry to one O(2), one O(6), and one O(8) atom. The Bi(2)-O(2) bond length is 2.15 Å. The Bi(2)-O(6) bond length is 2.17 Å. The Bi(2)-O(8) bond length is 2.17 Å. In the third Bi site, Bi(3) is bonded to one O(1), one O(3), one O(4), one O(5), one O(6), and one O(8) atom to form edge-sharing BiO6 octahedra. The Bi(3)-O(1) bond length is 2.17 Å. The Bi(3)-O(3) bond length is 2.18 Å. The Bi(3)-O(4) bond length is 2.12 Å. The Bi(3)-O(5) bond length is 2.10 Å. The Bi(3)-O(6) bond length is 2.24 Å. The Bi(3)-O(8) bond length is 2.25 Å. In the fourth Bi site, Bi(4) is bonded to one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom to form distorted edge-sharing BiO6 octahedra. The Bi(4)-O(2) bond length is 2.72 Å. The Bi(4)-O(3) bond length is 2.32 Å. The Bi(4)-O(4) bond length is 2.37 Å. The Bi(4)-O(5) bond length is 2.45 Å. The Bi(4)-O(6) bond length is 2.51 Å. The Bi(4)-O(7) bond length is 2.21 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Bi(1), and one Bi(3) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), one Bi(1), one Bi(2), and one Bi(4) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Mg(1), one Bi(3), and one Bi(4) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Bi(1), one Bi(3), and one Bi(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Bi(1), one Bi(3), and one Bi(4) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Bi(2), one Bi(3), and one Bi(4) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Bi(1), and one Bi(4) atom. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Bi(1), one Bi(2), and one Bi(3) atom.