MgPb2(WO4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(4), one O(6), and one O(7) atom to form distorted MgO4 tetrahedra that share corners with two equivalent W(2)O6 octahedra, corners with two equivalent Pb(1)O4 tetrahedra, and  an edgeedge with one W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-37°. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(8) atom to form WO6 octahedra that share corners with four equivalent Pb(1)O4 tetrahedra, edges with two equivalent W(2)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. In the second W site, W(2) is bonded to one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form distorted WO6 octahedra that share corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Pb(1)O4 tetrahedra, and edges with two equivalent W(1)O6 octahedra. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form distorted PbO4 tetrahedra that share corners with two equivalent W(2)O6 octahedra, corners with four equivalent W(1)O6 octahedra, and corners with two equivalent Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-69°. In the second Pb site, Pb(2) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mg(1), one W(1), and one Pb(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one W(1), one W(2), and one Pb(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one W(1), one W(2), one Pb(1), and one Pb(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Mg(1), one W(1), and one Pb(1) atom. In the fifth O site, O(5) is bonded in a distorted tetrahedral geometry to one W(1), one W(2), one Pb(1), and one Pb(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Mg(1), one W(2), and one Pb(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Mg(1), one W(2), and one Pb(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one W(1), one W(2), and one Pb(2) atom.
MgPb2(WO4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(4), one O(6), and one O(7) atom to form distorted MgO4 tetrahedra that share corners with two equivalent W(2)O6 octahedra, corners with two equivalent Pb(1)O4 tetrahedra, and  an edgeedge with one W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-37°. The Mg(1)-O(1) bond length is 1.98 Å. The Mg(1)-O(4) bond length is 1.98 Å. The Mg(1)-O(6) bond length is 1.97 Å. The Mg(1)-O(7) bond length is 1.98 Å. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(8) atom to form WO6 octahedra that share corners with four equivalent Pb(1)O4 tetrahedra, edges with two equivalent W(2)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. The W(1)-O(1) bond length is 1.94 Å. The W(1)-O(2) bond length is 2.11 Å. The W(1)-O(3) bond length is 2.04 Å. The W(1)-O(4) bond length is 1.95 Å. The W(1)-O(5) bond length is 2.04 Å. The W(1)-O(8) bond length is 2.10 Å. In the second W site, W(2) is bonded to one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form distorted WO6 octahedra that share corners with two equivalent Mg(1)O4 tetrahedra, corners with two equivalent Pb(1)O4 tetrahedra, and edges with two equivalent W(1)O6 octahedra. The W(2)-O(2) bond length is 2.02 Å. The W(2)-O(3) bond length is 2.20 Å. The W(2)-O(5) bond length is 2.23 Å. The W(2)-O(6) bond length is 1.93 Å. The W(2)-O(7) bond length is 1.90 Å. The W(2)-O(8) bond length is 2.03 Å. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form distorted PbO4 tetrahedra that share corners with two equivalent W(2)O6 octahedra, corners with four equivalent W(1)O6 octahedra, and corners with two equivalent Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-69°. The Pb(1)-O(1) bond length is 2.48 Å. The Pb(1)-O(3) bond length is 2.46 Å. The Pb(1)-O(4) bond length is 2.46 Å. The Pb(1)-O(5) bond length is 2.48 Å. In the second Pb site, Pb(2) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom. The Pb(2)-O(2) bond length is 2.39 Å. The Pb(2)-O(3) bond length is 2.68 Å. The Pb(2)-O(5) bond length is 2.58 Å. The Pb(2)-O(6) bond length is 2.52 Å. The Pb(2)-O(7) bond length is 2.64 Å. The Pb(2)-O(8) bond length is 2.38 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mg(1), one W(1), and one Pb(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one W(1), one W(2), and one Pb(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one W(1), one W(2), one Pb(1), and one Pb(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Mg(1), one W(1), and one Pb(1) atom. In the fifth O site, O(5) is bonded in a distorted tetrahedral geometry to one W(1), one W(2), one Pb(1), and one Pb(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Mg(1), one W(2), and one Pb(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Mg(1), one W(2), and one Pb(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one W(1), one W(2), and one Pb(2) atom.