BaMn2Ru4O11 crystallizes in the monoclinic C2/c space group. Ba(1) is bonded to two equivalent O(2), two equivalent O(4), two equivalent O(5), two equivalent O(6), and four equivalent O(1) atoms to form distorted BaO12 cuboctahedra that share corners with six equivalent Ba(1)O12 cuboctahedra, edges with two equivalent Mn(2)O6 octahedra, edges with two equivalent Ru(1)O6 octahedra, edges with two equivalent Ru(2)O6 octahedra, edges with three equivalent Mn(1)O5 trigonal bipyramids, and faces with six equivalent Ru(3)O6 octahedra. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(2), two equivalent O(1), and two equivalent O(3) atoms to form MnO5 trigonal bipyramids that share corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Ru(1)O6 octahedra, corners with two equivalent Ru(2)O6 octahedra, corners with six equivalent Ru(3)O6 octahedra, and edges with three equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 40-60°. In the second Mn site, Mn(2) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with four equivalent Ru(3)O6 octahedra, corners with two equivalent Mn(1)O5 trigonal bipyramids, edges with two equivalent Ba(1)O12 cuboctahedra, edges with two equivalent Ru(1)O6 octahedra, and edges with two equivalent Ru(2)O6 octahedra. The corner-sharing octahedral tilt angles are 54°. There are three inequivalent Ru sites. In the first Ru site, Ru(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(6) atoms to form RuO6 octahedra that share corners with four equivalent Ru(3)O6 octahedra, corners with two equivalent Mn(1)O5 trigonal bipyramids, edges with two equivalent Ba(1)O12 cuboctahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Ru(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-52°. In the second Ru site, Ru(2) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form RuO6 octahedra that share corners with four equivalent Ru(3)O6 octahedra, corners with two equivalent Mn(1)O5 trigonal bipyramids, edges with two equivalent Ba(1)O12 cuboctahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Ru(1)O6 octahedra. The corner-sharing octahedral tilt angles are 51°. In the third Ru site, Ru(3) is bonded to one O(2), one O(4), one O(5), one O(6), and two equivalent O(1) atoms to form RuO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Ru(1)O6 octahedra, corners with two equivalent Ru(2)O6 octahedra, corners with three equivalent Mn(1)O5 trigonal bipyramids, faces with three equivalent Ba(1)O12 cuboctahedra, and  a faceface with one Ru(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-54°. There are six inequivalent O sites. In the first O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Ru(1), and one Ru(2) atom. In the second O site, O(4) is bonded in a 4-coordinate geometry to one Ba(1), one Ru(1), one Ru(2), and one Ru(3) atom. In the third O site, O(5) is bonded in a 4-coordinate geometry to one Ba(1), one Mn(2), one Ru(2), and one Ru(3) atom. In the fourth O site, O(6) is bonded in a 4-coordinate geometry to one Ba(1), one Mn(2), one Ru(1), and one Ru(3) atom. In the fifth O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Ba(1), one Mn(1), and two equivalent Ru(3) atoms. In the sixth O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Ba(1), one Mn(1), and two equivalent Ru(3) atoms.
BaMn2Ru4O11 crystallizes in the monoclinic C2/c space group. Ba(1) is bonded to two equivalent O(2), two equivalent O(4), two equivalent O(5), two equivalent O(6), and four equivalent O(1) atoms to form distorted BaO12 cuboctahedra that share corners with six equivalent Ba(1)O12 cuboctahedra, edges with two equivalent Mn(2)O6 octahedra, edges with two equivalent Ru(1)O6 octahedra, edges with two equivalent Ru(2)O6 octahedra, edges with three equivalent Mn(1)O5 trigonal bipyramids, and faces with six equivalent Ru(3)O6 octahedra. Both Ba(1)-O(2) bond lengths are 3.04 Å. Both Ba(1)-O(4) bond lengths are 2.91 Å. Both Ba(1)-O(5) bond lengths are 2.87 Å. Both Ba(1)-O(6) bond lengths are 2.87 Å. There are two shorter (3.01 Å) and two longer (3.04 Å) Ba(1)-O(1) bond lengths. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(2), two equivalent O(1), and two equivalent O(3) atoms to form MnO5 trigonal bipyramids that share corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Ru(1)O6 octahedra, corners with two equivalent Ru(2)O6 octahedra, corners with six equivalent Ru(3)O6 octahedra, and edges with three equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 40-60°. The Mn(1)-O(2) bond length is 1.98 Å. Both Mn(1)-O(1) bond lengths are 1.99 Å. Both Mn(1)-O(3) bond lengths are 2.24 Å. In the second Mn site, Mn(2) is bonded to two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with four equivalent Ru(3)O6 octahedra, corners with two equivalent Mn(1)O5 trigonal bipyramids, edges with two equivalent Ba(1)O12 cuboctahedra, edges with two equivalent Ru(1)O6 octahedra, and edges with two equivalent Ru(2)O6 octahedra. The corner-sharing octahedral tilt angles are 54°. Both Mn(2)-O(3) bond lengths are 2.17 Å. Both Mn(2)-O(5) bond lengths are 2.07 Å. Both Mn(2)-O(6) bond lengths are 2.08 Å. There are three inequivalent Ru sites. In the first Ru site, Ru(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(6) atoms to form RuO6 octahedra that share corners with four equivalent Ru(3)O6 octahedra, corners with two equivalent Mn(1)O5 trigonal bipyramids, edges with two equivalent Ba(1)O12 cuboctahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Ru(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-52°. Both Ru(1)-O(3) bond lengths are 2.06 Å. Both Ru(1)-O(4) bond lengths are 2.04 Å. Both Ru(1)-O(6) bond lengths are 2.00 Å. In the second Ru site, Ru(2) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form RuO6 octahedra that share corners with four equivalent Ru(3)O6 octahedra, corners with two equivalent Mn(1)O5 trigonal bipyramids, edges with two equivalent Ba(1)O12 cuboctahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Ru(1)O6 octahedra. The corner-sharing octahedral tilt angles are 51°. Both Ru(2)-O(3) bond lengths are 2.06 Å. Both Ru(2)-O(4) bond lengths are 2.05 Å. Both Ru(2)-O(5) bond lengths are 2.01 Å. In the third Ru site, Ru(3) is bonded to one O(2), one O(4), one O(5), one O(6), and two equivalent O(1) atoms to form RuO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Ru(1)O6 octahedra, corners with two equivalent Ru(2)O6 octahedra, corners with three equivalent Mn(1)O5 trigonal bipyramids, faces with three equivalent Ba(1)O12 cuboctahedra, and  a faceface with one Ru(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-54°. The Ru(3)-O(2) bond length is 2.05 Å. The Ru(3)-O(4) bond length is 2.02 Å. The Ru(3)-O(5) bond length is 2.00 Å. The Ru(3)-O(6) bond length is 2.00 Å. Both Ru(3)-O(1) bond lengths are 2.04 Å. There are six inequivalent O sites. In the first O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Ru(1), and one Ru(2) atom. In the second O site, O(4) is bonded in a 4-coordinate geometry to one Ba(1), one Ru(1), one Ru(2), and one Ru(3) atom. In the third O site, O(5) is bonded in a 4-coordinate geometry to one Ba(1), one Mn(2), one Ru(2), and one Ru(3) atom. In the fourth O site, O(6) is bonded in a 4-coordinate geometry to one Ba(1), one Mn(2), one Ru(1), and one Ru(3) atom. In the fifth O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Ba(1), one Mn(1), and two equivalent Ru(3) atoms. In the sixth O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Ba(1), one Mn(1), and two equivalent Ru(3) atoms.