MgV4Cu3O14 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(12), one O(2), one O(4), one O(6), and one O(8) atom to form MgO5 trigonal bipyramids that share  a cornercorner with one V(2)O4 tetrahedra,  a cornercorner with one V(3)O4 tetrahedra,  a cornercorner with one V(4)O4 tetrahedra, corners with two equivalent V(1)O4 tetrahedra, and edges with two equivalent Cu(2)O5 trigonal bipyramids. There are four inequivalent V sites. In the first V site, V(1) is bonded to one O(12), one O(2), one O(5), and one O(9) atom to form VO4 tetrahedra that share  a cornercorner with one V(2)O4 tetrahedra,  a cornercorner with one Cu(1)O5 trigonal bipyramid,  a cornercorner with one Cu(2)O5 trigonal bipyramid,  a cornercorner with one Cu(3)O5 trigonal bipyramid, and corners with two equivalent Mg(1)O5 trigonal bipyramids. In the second V site, V(2) is bonded to one O(1), one O(11), one O(6), and one O(9) atom to form VO4 tetrahedra that share  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Cu(2)O5 trigonal bipyramid,  a cornercorner with one Cu(3)O5 trigonal bipyramid, and corners with two equivalent Cu(1)O5 trigonal bipyramids. In the third V site, V(3) is bonded to one O(10), one O(14), one O(4), and one O(7) atom to form VO4 tetrahedra that share  a cornercorner with one V(4)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Cu(1)O5 trigonal bipyramid,  a cornercorner with one Cu(3)O5 trigonal bipyramid, and corners with two equivalent Cu(2)O5 trigonal bipyramids. In the fourth V site, V(4) is bonded to one O(10), one O(13), one O(3), and one O(8) atom to form VO4 tetrahedra that share  a cornercorner with one V(3)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Cu(1)O5 trigonal bipyramid,  a cornercorner with one Cu(2)O5 trigonal bipyramid, and corners with two equivalent Cu(3)O5 trigonal bipyramids. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), one O(11), one O(3), one O(5), and one O(7) atom to form distorted CuO5 trigonal bipyramids that share  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one V(3)O4 tetrahedra,  a cornercorner with one V(4)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra, and edges with two equivalent Cu(3)O5 trigonal bipyramids. In the second Cu site, Cu(2) is bonded to one O(14), one O(2), one O(4), one O(6), and one O(8) atom to form CuO5 trigonal bipyramids that share  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one V(2)O4 tetrahedra,  a cornercorner with one V(4)O4 tetrahedra, corners with two equivalent V(3)O4 tetrahedra, and edges with two equivalent Mg(1)O5 trigonal bipyramids. In the third Cu site, Cu(3) is bonded to one O(1), one O(13), one O(3), one O(5), and one O(7) atom to form distorted CuO5 trigonal bipyramids that share  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one V(2)O4 tetrahedra,  a cornercorner with one V(3)O4 tetrahedra, corners with two equivalent V(4)O4 tetrahedra, and edges with two equivalent Cu(1)O5 trigonal bipyramids. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one V(2), one Cu(1), and one Cu(3) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Mg(1), one V(1), and one Cu(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one V(4), one Cu(1), and one Cu(3) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Mg(1), one V(3), and one Cu(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one V(1), one Cu(1), and one Cu(3) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mg(1), one V(2), and one Cu(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one V(3), one Cu(1), and one Cu(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mg(1), one V(4), and one Cu(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one V(1) and one V(2) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one V(3) and one V(4) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one V(2) and one Cu(1) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one Mg(1) and one V(1) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one V(4) and one Cu(3) atom. In the fourteenth O site, O(14) is bonded in a bent 150 degrees geometry to one V(3) and one Cu(2) atom.
MgV4Cu3O14 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(12), one O(2), one O(4), one O(6), and one O(8) atom to form MgO5 trigonal bipyramids that share  a cornercorner with one V(2)O4 tetrahedra,  a cornercorner with one V(3)O4 tetrahedra,  a cornercorner with one V(4)O4 tetrahedra, corners with two equivalent V(1)O4 tetrahedra, and edges with two equivalent Cu(2)O5 trigonal bipyramids. The Mg(1)-O(12) bond length is 2.02 Å. The Mg(1)-O(2) bond length is 2.05 Å. The Mg(1)-O(4) bond length is 2.03 Å. The Mg(1)-O(6) bond length is 2.06 Å. The Mg(1)-O(8) bond length is 2.05 Å. There are four inequivalent V sites. In the first V site, V(1) is bonded to one O(12), one O(2), one O(5), and one O(9) atom to form VO4 tetrahedra that share  a cornercorner with one V(2)O4 tetrahedra,  a cornercorner with one Cu(1)O5 trigonal bipyramid,  a cornercorner with one Cu(2)O5 trigonal bipyramid,  a cornercorner with one Cu(3)O5 trigonal bipyramid, and corners with two equivalent Mg(1)O5 trigonal bipyramids. The V(1)-O(12) bond length is 1.68 Å. The V(1)-O(2) bond length is 1.76 Å. The V(1)-O(5) bond length is 1.77 Å. The V(1)-O(9) bond length is 1.79 Å. In the second V site, V(2) is bonded to one O(1), one O(11), one O(6), and one O(9) atom to form VO4 tetrahedra that share  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Cu(2)O5 trigonal bipyramid,  a cornercorner with one Cu(3)O5 trigonal bipyramid, and corners with two equivalent Cu(1)O5 trigonal bipyramids. The V(2)-O(1) bond length is 1.73 Å. The V(2)-O(11) bond length is 1.70 Å. The V(2)-O(6) bond length is 1.77 Å. The V(2)-O(9) bond length is 1.82 Å. In the third V site, V(3) is bonded to one O(10), one O(14), one O(4), and one O(7) atom to form VO4 tetrahedra that share  a cornercorner with one V(4)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Cu(1)O5 trigonal bipyramid,  a cornercorner with one Cu(3)O5 trigonal bipyramid, and corners with two equivalent Cu(2)O5 trigonal bipyramids. The V(3)-O(10) bond length is 1.81 Å. The V(3)-O(14) bond length is 1.70 Å. The V(3)-O(4) bond length is 1.71 Å. The V(3)-O(7) bond length is 1.79 Å. In the fourth V site, V(4) is bonded to one O(10), one O(13), one O(3), and one O(8) atom to form VO4 tetrahedra that share  a cornercorner with one V(3)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Cu(1)O5 trigonal bipyramid,  a cornercorner with one Cu(2)O5 trigonal bipyramid, and corners with two equivalent Cu(3)O5 trigonal bipyramids. The V(4)-O(10) bond length is 1.81 Å. The V(4)-O(13) bond length is 1.70 Å. The V(4)-O(3) bond length is 1.73 Å. The V(4)-O(8) bond length is 1.78 Å. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), one O(11), one O(3), one O(5), and one O(7) atom to form distorted CuO5 trigonal bipyramids that share  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one V(3)O4 tetrahedra,  a cornercorner with one V(4)O4 tetrahedra, corners with two equivalent V(2)O4 tetrahedra, and edges with two equivalent Cu(3)O5 trigonal bipyramids. The Cu(1)-O(1) bond length is 2.39 Å. The Cu(1)-O(11) bond length is 1.91 Å. The Cu(1)-O(3) bond length is 1.94 Å. The Cu(1)-O(5) bond length is 1.97 Å. The Cu(1)-O(7) bond length is 1.95 Å. In the second Cu site, Cu(2) is bonded to one O(14), one O(2), one O(4), one O(6), and one O(8) atom to form CuO5 trigonal bipyramids that share  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one V(2)O4 tetrahedra,  a cornercorner with one V(4)O4 tetrahedra, corners with two equivalent V(3)O4 tetrahedra, and edges with two equivalent Mg(1)O5 trigonal bipyramids. The Cu(2)-O(14) bond length is 1.92 Å. The Cu(2)-O(2) bond length is 2.00 Å. The Cu(2)-O(4) bond length is 2.31 Å. The Cu(2)-O(6) bond length is 1.97 Å. The Cu(2)-O(8) bond length is 1.98 Å. In the third Cu site, Cu(3) is bonded to one O(1), one O(13), one O(3), one O(5), and one O(7) atom to form distorted CuO5 trigonal bipyramids that share  a cornercorner with one V(1)O4 tetrahedra,  a cornercorner with one V(2)O4 tetrahedra,  a cornercorner with one V(3)O4 tetrahedra, corners with two equivalent V(4)O4 tetrahedra, and edges with two equivalent Cu(1)O5 trigonal bipyramids. The Cu(3)-O(1) bond length is 1.94 Å. The Cu(3)-O(13) bond length is 1.93 Å. The Cu(3)-O(3) bond length is 2.35 Å. The Cu(3)-O(5) bond length is 2.00 Å. The Cu(3)-O(7) bond length is 1.96 Å. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one V(2), one Cu(1), and one Cu(3) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Mg(1), one V(1), and one Cu(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one V(4), one Cu(1), and one Cu(3) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Mg(1), one V(3), and one Cu(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one V(1), one Cu(1), and one Cu(3) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mg(1), one V(2), and one Cu(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one V(3), one Cu(1), and one Cu(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mg(1), one V(4), and one Cu(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one V(1) and one V(2) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one V(3) and one V(4) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one V(2) and one Cu(1) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one Mg(1) and one V(1) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one V(4) and one Cu(3) atom. In the fourteenth O site, O(14) is bonded in a bent 150 degrees geometry to one V(3) and one Cu(2) atom.