MgNdCu(WO4)2 crystallizes in the triclinic P-1 space group. Mg(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Nd(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form NdO6 octahedra that share corners with eight equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 33-64°. W(1) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted WO6 octahedra that share corners with four equivalent Nd(1)O6 octahedra and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 33-64°. Cu(1) is bonded in a linear geometry to two equivalent O(3) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Nd(1) and one W(1) atom. In the second O site, O(2) is bonded in a T-shaped geometry to one Mg(1), one Nd(1), and one W(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Mg(1), two equivalent W(1), and one Cu(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Mg(1), one Nd(1), and two equivalent W(1) atoms.
MgNdCu(WO4)2 crystallizes in the triclinic P-1 space group. Mg(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Both Mg(1)-O(2) bond lengths are 1.97 Å. Both Mg(1)-O(3) bond lengths are 2.34 Å. Both Mg(1)-O(4) bond lengths are 2.20 Å. Nd(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form NdO6 octahedra that share corners with eight equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 33-64°. Both Nd(1)-O(1) bond lengths are 2.41 Å. Both Nd(1)-O(2) bond lengths are 2.35 Å. Both Nd(1)-O(4) bond lengths are 2.54 Å. W(1) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted WO6 octahedra that share corners with four equivalent Nd(1)O6 octahedra and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 33-64°. The W(1)-O(1) bond length is 1.81 Å. The W(1)-O(2) bond length is 2.00 Å. There is one shorter (2.05 Å) and one longer (2.13 Å) W(1)-O(3) bond length. There is one shorter (2.09 Å) and one longer (2.26 Å) W(1)-O(4) bond length. Cu(1) is bonded in a linear geometry to two equivalent O(3) atoms. Both Cu(1)-O(3) bond lengths are 1.82 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Nd(1) and one W(1) atom. In the second O site, O(2) is bonded in a T-shaped geometry to one Mg(1), one Nd(1), and one W(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Mg(1), two equivalent W(1), and one Cu(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Mg(1), one Nd(1), and two equivalent W(1) atoms.