Mg2WPb4TeO12 crystallizes in the orthorhombic Pmc2_1 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(3), one O(5), one O(7), one O(9), and two equivalent O(2) atoms to form MgO6 octahedra that share corners with two equivalent Te(1)O6 octahedra and corners with four equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-8°. In the second Mg site, Mg(2) is bonded to one O(10), one O(4), one O(6), one O(8), and two equivalent O(1) atoms to form MgO6 octahedra that share corners with two equivalent W(1)O6 octahedra and corners with four equivalent Te(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-8°. W(1) is bonded to one O(3), one O(5), one O(7), one O(9), and two equivalent O(1) atoms to form WO6 octahedra that share corners with two equivalent Mg(2)O6 octahedra and corners with four equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-8°. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(2), one O(6), and one O(7) atom. In the second Pb site, Pb(2) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(5), and one O(8) atom. Te(1) is bonded to one O(10), one O(4), one O(6), one O(8), and two equivalent O(2) atoms to form TeO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra and corners with four equivalent Mg(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-8°. There are ten inequivalent O sites. In the first O site, O(7) is bonded in a 4-coordinate geometry to one Mg(1), one W(1), and two equivalent Pb(1) atoms. In the second O site, O(8) is bonded in a distorted linear geometry to one Mg(2), two equivalent Pb(2), and one Te(1) atom. In the third O site, O(9) is bonded in a linear geometry to one Mg(1) and one W(1) atom. In the fourth O site, O(10) is bonded in a linear geometry to one Mg(2), two equivalent Pb(1), and one Te(1) atom. In the fifth O site, O(1) is bonded in a distorted linear geometry to one Mg(2), one W(1), one Pb(1), and one Pb(2) atom. In the sixth O site, O(2) is bonded in a distorted linear geometry to one Mg(1), one Pb(1), one Pb(2), and one Te(1) atom. In the seventh O site, O(3) is bonded in a linear geometry to one Mg(1) and one W(1) atom. In the eighth O site, O(4) is bonded in a linear geometry to one Mg(2) and one Te(1) atom. In the ninth O site, O(5) is bonded in a distorted linear geometry to one Mg(1), one W(1), and two equivalent Pb(2) atoms. In the tenth O site, O(6) is bonded in a distorted linear geometry to one Mg(2), two equivalent Pb(1), and one Te(1) atom.
Mg2WPb4TeO12 crystallizes in the orthorhombic Pmc2_1 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(3), one O(5), one O(7), one O(9), and two equivalent O(2) atoms to form MgO6 octahedra that share corners with two equivalent Te(1)O6 octahedra and corners with four equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-8°. The Mg(1)-O(3) bond length is 2.07 Å. The Mg(1)-O(5) bond length is 2.14 Å. The Mg(1)-O(7) bond length is 2.09 Å. The Mg(1)-O(9) bond length is 2.11 Å. Both Mg(1)-O(2) bond lengths are 2.10 Å. In the second Mg site, Mg(2) is bonded to one O(10), one O(4), one O(6), one O(8), and two equivalent O(1) atoms to form MgO6 octahedra that share corners with two equivalent W(1)O6 octahedra and corners with four equivalent Te(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-8°. The Mg(2)-O(10) bond length is 2.12 Å. The Mg(2)-O(4) bond length is 2.06 Å. The Mg(2)-O(6) bond length is 2.17 Å. The Mg(2)-O(8) bond length is 2.11 Å. Both Mg(2)-O(1) bond lengths are 2.09 Å. W(1) is bonded to one O(3), one O(5), one O(7), one O(9), and two equivalent O(1) atoms to form WO6 octahedra that share corners with two equivalent Mg(2)O6 octahedra and corners with four equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 3-8°. The W(1)-O(3) bond length is 1.90 Å. The W(1)-O(5) bond length is 1.95 Å. The W(1)-O(7) bond length is 2.02 Å. The W(1)-O(9) bond length is 1.96 Å. Both W(1)-O(1) bond lengths are 1.96 Å. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(2), one O(6), and one O(7) atom. The Pb(1)-O(1) bond length is 2.67 Å. The Pb(1)-O(10) bond length is 2.81 Å. The Pb(1)-O(2) bond length is 2.75 Å. The Pb(1)-O(6) bond length is 2.70 Å. The Pb(1)-O(7) bond length is 2.65 Å. In the second Pb site, Pb(2) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(5), and one O(8) atom. The Pb(2)-O(1) bond length is 2.75 Å. The Pb(2)-O(2) bond length is 2.70 Å. The Pb(2)-O(5) bond length is 2.72 Å. The Pb(2)-O(8) bond length is 2.66 Å. Te(1) is bonded to one O(10), one O(4), one O(6), one O(8), and two equivalent O(2) atoms to form TeO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra and corners with four equivalent Mg(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-8°. The Te(1)-O(10) bond length is 1.95 Å. The Te(1)-O(4) bond length is 1.92 Å. The Te(1)-O(6) bond length is 1.95 Å. The Te(1)-O(8) bond length is 1.98 Å. Both Te(1)-O(2) bond lengths are 1.94 Å. There are ten inequivalent O sites. In the first O site, O(7) is bonded in a 4-coordinate geometry to one Mg(1), one W(1), and two equivalent Pb(1) atoms. In the second O site, O(8) is bonded in a distorted linear geometry to one Mg(2), two equivalent Pb(2), and one Te(1) atom. In the third O site, O(9) is bonded in a linear geometry to one Mg(1) and one W(1) atom. In the fourth O site, O(10) is bonded in a linear geometry to one Mg(2), two equivalent Pb(1), and one Te(1) atom. In the fifth O site, O(1) is bonded in a distorted linear geometry to one Mg(2), one W(1), one Pb(1), and one Pb(2) atom. In the sixth O site, O(2) is bonded in a distorted linear geometry to one Mg(1), one Pb(1), one Pb(2), and one Te(1) atom. In the seventh O site, O(3) is bonded in a linear geometry to one Mg(1) and one W(1) atom. In the eighth O site, O(4) is bonded in a linear geometry to one Mg(2) and one Te(1) atom. In the ninth O site, O(5) is bonded in a distorted linear geometry to one Mg(1), one W(1), and two equivalent Pb(2) atoms. In the tenth O site, O(6) is bonded in a distorted linear geometry to one Mg(2), two equivalent Pb(1), and one Te(1) atom.