MgCoSiO4 is Ilmenite-derived structured and crystallizes in the orthorhombic Pnma space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with four equivalent Co(1)O6 octahedra, corners with two equivalent Si(1)O4 tetrahedra, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, and edges with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-62°. Co(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form CoO6 octahedra that share corners with four equivalent Mg(1)O6 octahedra, corners with four equivalent Co(1)O6 octahedra, corners with four equivalent Si(1)O4 tetrahedra, edges with two equivalent Mg(1)O6 octahedra, and  an edgeedge with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-62°. Si(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form SiO4 tetrahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Co(1)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, and edges with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-61°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Mg(1), one Co(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Mg(1), one Co(1), and one Si(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mg(1), two equivalent Co(1), and one Si(1) atom.
MgCoSiO4 is Ilmenite-derived structured and crystallizes in the orthorhombic Pnma space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with four equivalent Co(1)O6 octahedra, corners with two equivalent Si(1)O4 tetrahedra, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, and edges with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-62°. Both Mg(1)-O(1) bond lengths are 2.11 Å. Both Mg(1)-O(2) bond lengths are 2.10 Å. Both Mg(1)-O(3) bond lengths are 2.14 Å. Co(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form CoO6 octahedra that share corners with four equivalent Mg(1)O6 octahedra, corners with four equivalent Co(1)O6 octahedra, corners with four equivalent Si(1)O4 tetrahedra, edges with two equivalent Mg(1)O6 octahedra, and  an edgeedge with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-62°. The Co(1)-O(1) bond length is 2.21 Å. The Co(1)-O(2) bond length is 2.07 Å. There are two shorter (2.13 Å) and two longer (2.21 Å) Co(1)-O(3) bond lengths. Si(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form SiO4 tetrahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Co(1)O6 octahedra,  an edgeedge with one Co(1)O6 octahedra, and edges with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 57-61°. The Si(1)-O(1) bond length is 1.63 Å. The Si(1)-O(2) bond length is 1.68 Å. Both Si(1)-O(3) bond lengths are 1.66 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Mg(1), one Co(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Mg(1), one Co(1), and one Si(1) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mg(1), two equivalent Co(1), and one Si(1) atom.