V6O11 crystallizes in the orthorhombic Cmcm space group. There are four inequivalent V sites. In the first V site, V(1) is bonded to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms to form VO6 octahedra that share corners with two equivalent V(2)O6 octahedra, corners with four equivalent V(3)O6 octahedra, corners with three equivalent V(4)O5 trigonal bipyramids, and  a faceface with one V(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-53°. In the second V site, V(2) is bonded to two equivalent O(5) and four equivalent O(3) atoms to form VO6 octahedra that share corners with four equivalent V(1)O6 octahedra, corners with two equivalent V(4)O5 trigonal bipyramids, and edges with four equivalent V(3)O6 octahedra. The corner-sharing octahedral tilt angles are 53°. In the third V site, V(3) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form VO6 octahedra that share corners with four equivalent V(1)O6 octahedra, corners with two equivalent V(4)O5 trigonal bipyramids, edges with two equivalent V(2)O6 octahedra, and edges with two equivalent V(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-53°. In the fourth V site, V(4) is bonded to one O(2), two equivalent O(1), and two equivalent O(5) atoms to form corner-sharing VO5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 40-56°. There are five inequivalent O sites. In the first O site, O(5) is bonded in a rectangular see-saw-like geometry to one V(2), one V(4), and two equivalent V(3) atoms. In the second O site, O(1) is bonded in a distorted T-shaped geometry to one V(4) and two equivalent V(1) atoms. In the third O site, O(2) is bonded in a 3-coordinate geometry to one V(4) and two equivalent V(1) atoms. In the fourth O site, O(3) is bonded in a trigonal planar geometry to one V(1), one V(2), and one V(3) atom. In the fifth O site, O(4) is bonded in a trigonal planar geometry to one V(1) and two equivalent V(3) atoms.
V6O11 crystallizes in the orthorhombic Cmcm space group. There are four inequivalent V sites. In the first V site, V(1) is bonded to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms to form VO6 octahedra that share corners with two equivalent V(2)O6 octahedra, corners with four equivalent V(3)O6 octahedra, corners with three equivalent V(4)O5 trigonal bipyramids, and  a faceface with one V(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-53°. The V(1)-O(2) bond length is 2.13 Å. The V(1)-O(4) bond length is 2.04 Å. Both V(1)-O(1) bond lengths are 2.03 Å. Both V(1)-O(3) bond lengths are 2.00 Å. In the second V site, V(2) is bonded to two equivalent O(5) and four equivalent O(3) atoms to form VO6 octahedra that share corners with four equivalent V(1)O6 octahedra, corners with two equivalent V(4)O5 trigonal bipyramids, and edges with four equivalent V(3)O6 octahedra. The corner-sharing octahedral tilt angles are 53°. Both V(2)-O(5) bond lengths are 2.06 Å. All V(2)-O(3) bond lengths are 1.92 Å. In the third V site, V(3) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form VO6 octahedra that share corners with four equivalent V(1)O6 octahedra, corners with two equivalent V(4)O5 trigonal bipyramids, edges with two equivalent V(2)O6 octahedra, and edges with two equivalent V(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-53°. Both V(3)-O(3) bond lengths are 1.95 Å. Both V(3)-O(4) bond lengths are 1.91 Å. Both V(3)-O(5) bond lengths are 2.04 Å. In the fourth V site, V(4) is bonded to one O(2), two equivalent O(1), and two equivalent O(5) atoms to form corner-sharing VO5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 40-56°. The V(4)-O(2) bond length is 1.75 Å. Both V(4)-O(1) bond lengths are 1.85 Å. Both V(4)-O(5) bond lengths are 2.19 Å. There are five inequivalent O sites. In the first O site, O(5) is bonded in a rectangular see-saw-like geometry to one V(2), one V(4), and two equivalent V(3) atoms. In the second O site, O(1) is bonded in a distorted T-shaped geometry to one V(4) and two equivalent V(1) atoms. In the third O site, O(2) is bonded in a 3-coordinate geometry to one V(4) and two equivalent V(1) atoms. In the fourth O site, O(3) is bonded in a trigonal planar geometry to one V(1), one V(2), and one V(3) atom. In the fifth O site, O(4) is bonded in a trigonal planar geometry to one V(1) and two equivalent V(3) atoms.