Co4OF11 crystallizes in the triclinic P1 space group. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one F(10), one F(2), one F(3), one F(4), and one F(9) atom to form CoOF5 octahedra that share corners with two equivalent Co(3)OF5 octahedra and corners with four equivalent Co(2)F6 octahedra. The corner-sharing octahedral tilt angles range from 28-36°. In the second Co site, Co(2) is bonded to one F(1), one F(10), one F(11), one F(2), one F(4), and one F(9) atom to form CoF6 octahedra that share corners with two equivalent Co(4)F6 octahedra and corners with four equivalent Co(1)OF5 octahedra. The corner-sharing octahedral tilt angles range from 35-38°. In the third Co site, Co(3) is bonded to one O(1), one F(3), one F(5), one F(6), one F(7), and one F(8) atom to form CoOF5 octahedra that share corners with two equivalent Co(1)OF5 octahedra and corners with four equivalent Co(4)F6 octahedra. The corner-sharing octahedral tilt angles range from 28-39°. In the fourth Co site, Co(4) is bonded to one F(1), one F(11), one F(5), one F(6), one F(7), and one F(8) atom to form CoF6 octahedra that share corners with two equivalent Co(2)F6 octahedra and corners with four equivalent Co(3)OF5 octahedra. The corner-sharing octahedral tilt angles range from 35-39°. O(1) is bonded in a bent 150 degrees geometry to one Co(1) and one Co(3) atom. There are eleven inequivalent F sites. In the first F site, F(1) is bonded in a bent 150 degrees geometry to one Co(2) and one Co(4) atom. In the second F site, F(2) is bonded in a bent 150 degrees geometry to one Co(1) and one Co(2) atom. In the third F site, F(3) is bonded in a bent 150 degrees geometry to one Co(1) and one Co(3) atom. In the fourth F site, F(4) is bonded in a bent 150 degrees geometry to one Co(1) and one Co(2) atom. In the fifth F site, F(5) is bonded in a bent 150 degrees geometry to one Co(3) and one Co(4) atom. In the sixth F site, F(6) is bonded in a bent 150 degrees geometry to one Co(3) and one Co(4) atom. In the seventh F site, F(7) is bonded in a bent 150 degrees geometry to one Co(3) and one Co(4) atom. In the eighth F site, F(8) is bonded in a bent 150 degrees geometry to one Co(3) and one Co(4) atom. In the ninth F site, F(9) is bonded in a bent 150 degrees geometry to one Co(1) and one Co(2) atom. In the tenth F site, F(10) is bonded in a bent 150 degrees geometry to one Co(1) and one Co(2) atom. In the eleventh F site, F(11) is bonded in a bent 150 degrees geometry to one Co(2) and one Co(4) atom.
Co4OF11 crystallizes in the triclinic P1 space group. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one F(10), one F(2), one F(3), one F(4), and one F(9) atom to form CoOF5 octahedra that share corners with two equivalent Co(3)OF5 octahedra and corners with four equivalent Co(2)F6 octahedra. The corner-sharing octahedral tilt angles range from 28-36°. The Co(1)-O(1) bond length is 1.76 Å. The Co(1)-F(10) bond length is 1.91 Å. The Co(1)-F(2) bond length is 1.89 Å. The Co(1)-F(3) bond length is 1.87 Å. The Co(1)-F(4) bond length is 2.00 Å. The Co(1)-F(9) bond length is 2.01 Å. In the second Co site, Co(2) is bonded to one F(1), one F(10), one F(11), one F(2), one F(4), and one F(9) atom to form CoF6 octahedra that share corners with two equivalent Co(4)F6 octahedra and corners with four equivalent Co(1)OF5 octahedra. The corner-sharing octahedral tilt angles range from 35-38°. The Co(2)-F(1) bond length is 1.94 Å. The Co(2)-F(10) bond length is 1.96 Å. The Co(2)-F(11) bond length is 1.96 Å. The Co(2)-F(2) bond length is 1.97 Å. The Co(2)-F(4) bond length is 1.87 Å. The Co(2)-F(9) bond length is 1.86 Å. In the third Co site, Co(3) is bonded to one O(1), one F(3), one F(5), one F(6), one F(7), and one F(8) atom to form CoOF5 octahedra that share corners with two equivalent Co(1)OF5 octahedra and corners with four equivalent Co(4)F6 octahedra. The corner-sharing octahedral tilt angles range from 28-39°. The Co(3)-O(1) bond length is 1.84 Å. The Co(3)-F(3) bond length is 2.07 Å. The Co(3)-F(5) bond length is 1.92 Å. The Co(3)-F(6) bond length is 1.94 Å. The Co(3)-F(7) bond length is 1.96 Å. The Co(3)-F(8) bond length is 1.89 Å. In the fourth Co site, Co(4) is bonded to one F(1), one F(11), one F(5), one F(6), one F(7), and one F(8) atom to form CoF6 octahedra that share corners with two equivalent Co(2)F6 octahedra and corners with four equivalent Co(3)OF5 octahedra. The corner-sharing octahedral tilt angles range from 35-39°. The Co(4)-F(1) bond length is 1.87 Å. The Co(4)-F(11) bond length is 1.89 Å. The Co(4)-F(5) bond length is 1.97 Å. The Co(4)-F(6) bond length is 1.94 Å. The Co(4)-F(7) bond length is 1.93 Å. The Co(4)-F(8) bond length is 1.98 Å. O(1) is bonded in a bent 150 degrees geometry to one Co(1) and one Co(3) atom. There are eleven inequivalent F sites. In the first F site, F(1) is bonded in a bent 150 degrees geometry to one Co(2) and one Co(4) atom. In the second F site, F(2) is bonded in a bent 150 degrees geometry to one Co(1) and one Co(2) atom. In the third F site, F(3) is bonded in a bent 150 degrees geometry to one Co(1) and one Co(3) atom. In the fourth F site, F(4) is bonded in a bent 150 degrees geometry to one Co(1) and one Co(2) atom. In the fifth F site, F(5) is bonded in a bent 150 degrees geometry to one Co(3) and one Co(4) atom. In the sixth F site, F(6) is bonded in a bent 150 degrees geometry to one Co(3) and one Co(4) atom. In the seventh F site, F(7) is bonded in a bent 150 degrees geometry to one Co(3) and one Co(4) atom. In the eighth F site, F(8) is bonded in a bent 150 degrees geometry to one Co(3) and one Co(4) atom. In the ninth F site, F(9) is bonded in a bent 150 degrees geometry to one Co(1) and one Co(2) atom. In the tenth F site, F(10) is bonded in a bent 150 degrees geometry to one Co(1) and one Co(2) atom. In the eleventh F site, F(11) is bonded in a bent 150 degrees geometry to one Co(2) and one Co(4) atom.