Ca2MnRuO6 crystallizes in the monoclinic P2_1/c space group. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(3), three equivalent O(1), and three equivalent O(2) atoms. Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with six equivalent Ru(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-33°. Ru(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form RuO6 octahedra that share corners with six equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-33°. There are three inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Ca(1), one Mn(1), and one Ru(1) atom to form distorted OCa3MnRu trigonal bipyramids that share corners with four equivalent O(3)Ca2MnRu tetrahedra, corners with six equivalent O(1)Ca3MnRu trigonal bipyramids, edges with three equivalent O(3)Ca2MnRu tetrahedra, and  an edgeedge with one O(1)Ca3MnRu trigonal bipyramid. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Ca(1), one Mn(1), and one Ru(1) atom. In the third O site, O(3) is bonded to two equivalent Ca(1), one Mn(1), and one Ru(1) atom to form distorted OCa2MnRu tetrahedra that share corners with four equivalent O(3)Ca2MnRu tetrahedra, corners with four equivalent O(1)Ca3MnRu trigonal bipyramids, and edges with three equivalent O(1)Ca3MnRu trigonal bipyramids.
Ca2MnRuO6 crystallizes in the monoclinic P2_1/c space group. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(3), three equivalent O(1), and three equivalent O(2) atoms. There is one shorter (2.35 Å) and one longer (2.42 Å) Ca(1)-O(3) bond length. There are a spread of Ca(1)-O(1) bond distances ranging from 2.38-2.65 Å. There are a spread of Ca(1)-O(2) bond distances ranging from 2.35-2.69 Å. Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with six equivalent Ru(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-33°. Both Mn(1)-O(1) bond lengths are 2.12 Å. Both Mn(1)-O(2) bond lengths are 2.12 Å. Both Mn(1)-O(3) bond lengths are 1.93 Å. Ru(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form RuO6 octahedra that share corners with six equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-33°. Both Ru(1)-O(1) bond lengths are 1.97 Å. Both Ru(1)-O(2) bond lengths are 1.97 Å. Both Ru(1)-O(3) bond lengths are 1.99 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Ca(1), one Mn(1), and one Ru(1) atom to form distorted OCa3MnRu trigonal bipyramids that share corners with four equivalent O(3)Ca2MnRu tetrahedra, corners with six equivalent O(1)Ca3MnRu trigonal bipyramids, edges with three equivalent O(3)Ca2MnRu tetrahedra, and  an edgeedge with one O(1)Ca3MnRu trigonal bipyramid. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Ca(1), one Mn(1), and one Ru(1) atom. In the third O site, O(3) is bonded to two equivalent Ca(1), one Mn(1), and one Ru(1) atom to form distorted OCa2MnRu tetrahedra that share corners with four equivalent O(3)Ca2MnRu tetrahedra, corners with four equivalent O(1)Ca3MnRu trigonal bipyramids, and edges with three equivalent O(1)Ca3MnRu trigonal bipyramids.