MgCo2(MoO4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(3), one O(4), one O(5), and one O(7) atom to form MgO5 trigonal bipyramids that share  a cornercorner with one Co(1)O6 octahedra, corners with three equivalent Mo(1)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Mo(2)O6 octahedra, and edges with two equivalent Co(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 28-70°. There are two inequivalent Mo sites. In the first Mo site, Mo(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 distorted MoO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with three equivalent Mg(1)O5 trigonal bipyramids,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Mo(2)O6 octahedra, and edges with two equivalent Co(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 19-21°. In the second Mo site, Mo(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 distorted MoO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with three equivalent Co(2)O5 trigonal bipyramids,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Mo(1)O6 octahedra, and edges with two equivalent Mg(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 20-22°. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(8) atom to form CoO6 octahedra that share corners with two equivalent Mo(1)O6 octahedra, corners with two equivalent Mo(2)O6 octahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Co(2)O5 trigonal bipyramid,  an edgeedge with one Mo(1)O6 octahedra,  an edgeedge with one Mo(2)O6 octahedra,  an edgeedge with one Mg(1)O5 trigonal bipyramid, and  an edgeedge with one Co(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 19-22°. In the second Co site, Co(2) is bonded to one O(1), one O(2), one O(4), one O(5), and one O(7) atom to form distorted CoO5 trigonal bipyramids that share  a cornercorner with one Co(1)O6 octahedra, corners with three equivalent Mo(2)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Mo(1)O6 octahedra, and edges with two equivalent Mg(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 30-71°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Mo(1), one Co(1), and one Co(2) atom. In the second O site, O(2) is bonded to one Mg(1), one Mo(1), one Co(1), and one Co(2) atom to form OMgCo2Mo trigonal pyramids that share corners with three equivalent O(5)MgCoMo2 tetrahedra,  a cornercorner with one O(4)MgCo2Mo trigonal pyramid, and  an edgeedge with one O(4)MgCo2Mo trigonal pyramid. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Mg(1), one Mo(2), and one Co(1) atom. In the fourth O site, O(4) is bonded to one Mg(1), one Mo(2), one Co(1), and one Co(2) atom to form OMgCo2Mo trigonal pyramids that share  a cornercorner with one O(5)MgCoMo2 tetrahedra,  a cornercorner with one O(2)MgCo2Mo trigonal pyramid,  an edgeedge with one O(5)MgCoMo2 tetrahedra, and  an edgeedge with one O(2)MgCo2Mo trigonal pyramid. In the fifth O site, O(5) is bonded to one Mg(1), one Mo(1), one Mo(2), and one Co(2) atom to form a mixture of distorted edge and corner-sharing OMgCoMo2 tetrahedra. In the sixth O site, O(6) is bonded in a T-shaped geometry to one Mo(1), one Mo(2), and one Co(1) atom. In the seventh O site, O(7) is bonded in a distorted see-saw-like geometry to one Mg(1), one Mo(1), one Mo(2), and one Co(2) atom. In the eighth O site, O(8) is bonded in a T-shaped geometry to one Mo(1), one Mo(2), and one Co(1) atom.
MgCo2(MoO4)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(3), one O(4), one O(5), and one O(7) atom to form MgO5 trigonal bipyramids that share  a cornercorner with one Co(1)O6 octahedra, corners with three equivalent Mo(1)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Mo(2)O6 octahedra, and edges with two equivalent Co(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 28-70°. The Mg(1)-O(2) bond length is 1.97 Å. The Mg(1)-O(3) bond length is 2.08 Å. The Mg(1)-O(4) bond length is 2.06 Å. The Mg(1)-O(5) bond length is 2.09 Å. The Mg(1)-O(7) bond length is 2.04 Å. There are two inequivalent Mo sites. In the first Mo site, Mo(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 distorted MoO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with three equivalent Mg(1)O5 trigonal bipyramids,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Mo(2)O6 octahedra, and edges with two equivalent Co(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 19-21°. The Mo(1)-O(1) bond length is 1.82 Å. The Mo(1)-O(2) bond length is 2.03 Å. The Mo(1)-O(5) bond length is 2.21 Å. The Mo(1)-O(6) bond length is 1.98 Å. The Mo(1)-O(7) bond length is 2.07 Å. The Mo(1)-O(8) bond length is 2.06 Å. In the second Mo site, Mo(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 distorted MoO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with three equivalent Co(2)O5 trigonal bipyramids,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Mo(1)O6 octahedra, and edges with two equivalent Mg(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 20-22°. The Mo(2)-O(3) bond length is 1.81 Å. The Mo(2)-O(4) bond length is 2.04 Å. The Mo(2)-O(5) bond length is 2.08 Å. The Mo(2)-O(6) bond length is 2.05 Å. The Mo(2)-O(7) bond length is 2.23 Å. The Mo(2)-O(8) bond length is 1.98 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(8) atom to form CoO6 octahedra that share corners with two equivalent Mo(1)O6 octahedra, corners with two equivalent Mo(2)O6 octahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Co(2)O5 trigonal bipyramid,  an edgeedge with one Mo(1)O6 octahedra,  an edgeedge with one Mo(2)O6 octahedra,  an edgeedge with one Mg(1)O5 trigonal bipyramid, and  an edgeedge with one Co(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 19-22°. The Co(1)-O(1) bond length is 2.13 Å. The Co(1)-O(2) bond length is 2.06 Å. The Co(1)-O(3) bond length is 2.16 Å. The Co(1)-O(4) bond length is 2.06 Å. The Co(1)-O(6) bond length is 2.10 Å. The Co(1)-O(8) bond length is 2.11 Å. In the second Co site, Co(2) is bonded to one O(1), one O(2), one O(4), one O(5), and one O(7) atom to form distorted CoO5 trigonal bipyramids that share  a cornercorner with one Co(1)O6 octahedra, corners with three equivalent Mo(2)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, edges with two equivalent Mo(1)O6 octahedra, and edges with two equivalent Mg(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 30-71°. The Co(2)-O(1) bond length is 2.10 Å. The Co(2)-O(2) bond length is 2.13 Å. The Co(2)-O(4) bond length is 1.98 Å. The Co(2)-O(5) bond length is 2.02 Å. The Co(2)-O(7) bond length is 2.10 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Mo(1), one Co(1), and one Co(2) atom. In the second O site, O(2) is bonded to one Mg(1), one Mo(1), one Co(1), and one Co(2) atom to form OMgCo2Mo trigonal pyramids that share corners with three equivalent O(5)MgCoMo2 tetrahedra,  a cornercorner with one O(4)MgCo2Mo trigonal pyramid, and  an edgeedge with one O(4)MgCo2Mo trigonal pyramid. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Mg(1), one Mo(2), and one Co(1) atom. In the fourth O site, O(4) is bonded to one Mg(1), one Mo(2), one Co(1), and one Co(2) atom to form OMgCo2Mo trigonal pyramids that share  a cornercorner with one O(5)MgCoMo2 tetrahedra,  a cornercorner with one O(2)MgCo2Mo trigonal pyramid,  an edgeedge with one O(5)MgCoMo2 tetrahedra, and  an edgeedge with one O(2)MgCo2Mo trigonal pyramid. In the fifth O site, O(5) is bonded to one Mg(1), one Mo(1), one Mo(2), and one Co(2) atom to form a mixture of distorted edge and corner-sharing OMgCoMo2 tetrahedra. In the sixth O site, O(6) is bonded in a T-shaped geometry to one Mo(1), one Mo(2), and one Co(1) atom. In the seventh O site, O(7) is bonded in a distorted see-saw-like geometry to one Mg(1), one Mo(1), one Mo(2), and one Co(2) atom. In the eighth O site, O(8) is bonded in a T-shaped geometry to one Mo(1), one Mo(2), and one Co(1) atom.