CaMgSiO4 is Ilmenite-derived structured and crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded to one O(2), one O(3), and four equivalent O(1) atoms to form distorted CaO6 octahedra that share corners with four equivalent Ca(1)O6 octahedra, corners with four equivalent Mg(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 56-64°. 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 Ca(1)O6 octahedra, corners with two equivalent Si(1)O4 tetrahedra, edges with two equivalent Ca(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-64°. Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Ca(1)O6 octahedra,  an edgeedge with one Ca(1)O6 octahedra, and edges with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-65°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Ca(1), one Mg(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), two equivalent Mg(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), two equivalent Mg(1), and one Si(1) atom.
CaMgSiO4 is Ilmenite-derived structured and crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded to one O(2), one O(3), and four equivalent O(1) atoms to form distorted CaO6 octahedra that share corners with four equivalent Ca(1)O6 octahedra, corners with four equivalent Mg(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 56-64°. The Ca(1)-O(2) bond length is 2.33 Å. The Ca(1)-O(3) bond length is 2.51 Å. There are two shorter (2.31 Å) and two longer (2.43 Å) Ca(1)-O(1) bond lengths. 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 Ca(1)O6 octahedra, corners with two equivalent Si(1)O4 tetrahedra, edges with two equivalent Ca(1)O6 octahedra, edges with two equivalent Mg(1)O6 octahedra, and edges with two equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-64°. Both Mg(1)-O(1) bond lengths are 2.14 Å. Both Mg(1)-O(2) bond lengths are 2.10 Å. Both Mg(1)-O(3) bond lengths are 2.21 Å. Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Ca(1)O6 octahedra,  an edgeedge with one Ca(1)O6 octahedra, and edges with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-65°. The Si(1)-O(2) bond length is 1.67 Å. The Si(1)-O(3) bond length is 1.63 Å. Both Si(1)-O(1) bond lengths are 1.66 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Ca(1), one Mg(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), two equivalent Mg(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), two equivalent Mg(1), and one Si(1) atom.