MgBi2(SbO4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(4), one O(5), one O(6), one O(7), and one O(8) atom to form distorted MgO5 square pyramids that share edges with two equivalent Sb(2)O6 octahedra. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(8) atom. In the second Bi site, Bi(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(6) atom. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(5), one O(7), and one O(8) atom. In the second Sb site, Sb(2) is bonded to one O(1), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form SbO6 octahedra that share edges with two equivalent Mg(1)O5 square pyramids. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Bi(1), one Bi(2), and one Sb(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Bi(1), one Bi(2), and one Sb(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Bi(1), one Bi(2), and one Sb(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Bi(1), and one Bi(2) atom. In the fifth O site, O(5) is bonded in a T-shaped geometry to one Mg(1), one Sb(1), and one Sb(2) atom. In the sixth O site, O(6) is bonded in a distorted water-like geometry to one Mg(1), one Bi(2), and one Sb(2) atom. In the seventh O site, O(7) is bonded in a distorted water-like geometry to one Mg(1), one Sb(1), and one Sb(2) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Mg(1), one Bi(1), one Sb(1), and one Sb(2) atom.
MgBi2(SbO4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(4), one O(5), one O(6), one O(7), and one O(8) atom to form distorted MgO5 square pyramids that share edges with two equivalent Sb(2)O6 octahedra. The Mg(1)-O(4) bond length is 1.98 Å. The Mg(1)-O(5) bond length is 2.16 Å. The Mg(1)-O(6) bond length is 1.97 Å. The Mg(1)-O(7) bond length is 2.01 Å. The Mg(1)-O(8) bond length is 2.14 Å. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(8) atom. The Bi(1)-O(1) bond length is 2.31 Å. The Bi(1)-O(2) bond length is 2.41 Å. The Bi(1)-O(3) bond length is 2.18 Å. The Bi(1)-O(4) bond length is 2.13 Å. The Bi(1)-O(8) bond length is 2.76 Å. In the second Bi site, Bi(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(6) atom. The Bi(2)-O(1) bond length is 2.23 Å. The Bi(2)-O(2) bond length is 2.21 Å. The Bi(2)-O(3) bond length is 2.33 Å. The Bi(2)-O(4) bond length is 2.26 Å. The Bi(2)-O(6) bond length is 2.75 Å. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(5), one O(7), and one O(8) atom. The Sb(1)-O(2) bond length is 2.00 Å. The Sb(1)-O(5) bond length is 2.04 Å. The Sb(1)-O(7) bond length is 2.61 Å. The Sb(1)-O(8) bond length is 2.09 Å. In the second Sb site, Sb(2) is bonded to one O(1), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form SbO6 octahedra that share edges with two equivalent Mg(1)O5 square pyramids. The Sb(2)-O(1) bond length is 2.09 Å. The Sb(2)-O(3) bond length is 2.05 Å. The Sb(2)-O(5) bond length is 2.06 Å. The Sb(2)-O(6) bond length is 1.97 Å. The Sb(2)-O(7) bond length is 1.95 Å. The Sb(2)-O(8) bond length is 2.14 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Bi(1), one Bi(2), and one Sb(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Bi(1), one Bi(2), and one Sb(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Bi(1), one Bi(2), and one Sb(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Bi(1), and one Bi(2) atom. In the fifth O site, O(5) is bonded in a T-shaped geometry to one Mg(1), one Sb(1), and one Sb(2) atom. In the sixth O site, O(6) is bonded in a distorted water-like geometry to one Mg(1), one Bi(2), and one Sb(2) atom. In the seventh O site, O(7) is bonded in a distorted water-like geometry to one Mg(1), one Sb(1), and one Sb(2) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Mg(1), one Bi(1), one Sb(1), and one Sb(2) atom.