MgNi2(WO4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(4), and one O(6) atom. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(5), one O(6), one O(7), and one O(8) atom to form edge-sharing WO6 octahedra. In the second W site, W(2) is bonded to one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom to form edge-sharing WO6 octahedra. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(5) atom. In the second Ni site, Ni(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), 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 trigonal planar geometry to one W(1), one Ni(1), and one Ni(2) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one W(1), one Ni(1), and one Ni(2) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Mg(1), one W(2), and one Ni(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one W(2), one Ni(1), and one Ni(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one W(1), one W(2), and one Ni(1) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Mg(1), one W(1), and one W(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one W(1), one W(2), and one Ni(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 Ni(2) atom.
MgNi2(WO4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(4), and one O(6) atom. The Mg(1)-O(2) bond length is 1.95 Å. The Mg(1)-O(3) bond length is 1.97 Å. The Mg(1)-O(4) bond length is 1.98 Å. The Mg(1)-O(6) bond length is 1.92 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(5), one O(6), one O(7), and one O(8) atom to form edge-sharing WO6 octahedra. The W(1)-O(1) bond length is 1.89 Å. The W(1)-O(2) bond length is 2.01 Å. The W(1)-O(5) bond length is 2.10 Å. The W(1)-O(6) bond length is 1.98 Å. The W(1)-O(7) bond length is 2.17 Å. The W(1)-O(8) bond length is 2.01 Å. In the second W site, W(2) is bonded to one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom to form edge-sharing WO6 octahedra. The W(2)-O(3) bond length is 1.91 Å. The W(2)-O(4) bond length is 2.08 Å. The W(2)-O(5) bond length is 1.99 Å. The W(2)-O(6) bond length is 2.10 Å. The W(2)-O(7) bond length is 1.99 Å. The W(2)-O(8) bond length is 2.07 Å. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(5) atom. The Ni(1)-O(1) bond length is 2.04 Å. The Ni(1)-O(2) bond length is 2.03 Å. The Ni(1)-O(3) bond length is 2.15 Å. The Ni(1)-O(4) bond length is 2.26 Å. The Ni(1)-O(5) bond length is 1.98 Å. In the second Ni site, Ni(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(7), and one O(8) atom. The Ni(2)-O(1) bond length is 2.06 Å. The Ni(2)-O(2) bond length is 2.15 Å. The Ni(2)-O(4) bond length is 2.09 Å. The Ni(2)-O(7) bond length is 2.03 Å. The Ni(2)-O(8) bond length is 2.32 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one W(1), one Ni(1), and one Ni(2) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one W(1), one Ni(1), and one Ni(2) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Mg(1), one W(2), and one Ni(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one W(2), one Ni(1), and one Ni(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one W(1), one W(2), and one Ni(1) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Mg(1), one W(1), and one W(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one W(1), one W(2), and one Ni(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 Ni(2) atom.