Cr4OF11 crystallizes in the triclinic P-1 space group. There are five inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(1), one F(1), one F(2), one F(5), one F(6), and one F(8) atom to form CrOF5 octahedra that share corners with three equivalent Cr(4)F6 octahedra and corners with three equivalent Cr(5)OF5 octahedra. The corner-sharing octahedral tilt angles range from 39-43°. In the second Cr site, Cr(2) is bonded to one F(10), one F(11), one F(3), one F(4), one F(7), and one F(9) atom to form CrF6 octahedra that share corners with three equivalent Cr(3)F6 octahedra and corners with three equivalent Cr(5)OF5 octahedra. The corner-sharing octahedral tilt angles range from 39-42°. In the third Cr site, Cr(3) is bonded to two equivalent F(10), two equivalent F(4), and two equivalent F(7) atoms to form corner-sharing CrF6 octahedra. The corner-sharing octahedral tilt angles are 40°. In the fourth Cr site, Cr(4) is bonded to two equivalent F(2), two equivalent F(6), and two equivalent F(8) atoms to form corner-sharing CrF6 octahedra. The corner-sharing octahedral tilt angles range from 39-42°. In the fifth Cr site, Cr(5) is bonded to one O(1), one F(1), one F(11), one F(3), one F(5), and one F(9) atom to form CrOF5 octahedra that share corners with three equivalent Cr(2)F6 octahedra and corners with three equivalent Cr(1)OF5 octahedra. The corner-sharing octahedral tilt angles range from 39-43°. O(1) is bonded in a bent 150 degrees geometry to one Cr(1) and one Cr(5) atom. There are eleven inequivalent F sites. In the first F site, F(1) is bonded in a bent 150 degrees geometry to one Cr(1) and one Cr(5) atom. In the second F site, F(2) is bonded in a bent 150 degrees geometry to one Cr(1) and one Cr(4) atom. In the third F site, F(3) is bonded in a bent 150 degrees geometry to one Cr(2) and one Cr(5) atom. In the fourth F site, F(4) is bonded in a bent 150 degrees geometry to one Cr(2) and one Cr(3) atom. In the fifth F site, F(5) is bonded in a bent 150 degrees geometry to one Cr(1) and one Cr(5) atom. In the sixth F site, F(6) is bonded in a bent 150 degrees geometry to one Cr(1) and one Cr(4) atom. In the seventh F site, F(7) is bonded in a bent 150 degrees geometry to one Cr(2) and one Cr(3) atom. In the eighth F site, F(8) is bonded in a bent 150 degrees geometry to one Cr(1) and one Cr(4) atom. In the ninth F site, F(9) is bonded in a bent 150 degrees geometry to one Cr(2) and one Cr(5) atom. In the tenth F site, F(10) is bonded in a bent 150 degrees geometry to one Cr(2) and one Cr(3) atom. In the eleventh F site, F(11) is bonded in a bent 150 degrees geometry to one Cr(2) and one Cr(5) atom.
Cr4OF11 crystallizes in the triclinic P-1 space group. There are five inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(1), one F(1), one F(2), one F(5), one F(6), and one F(8) atom to form CrOF5 octahedra that share corners with three equivalent Cr(4)F6 octahedra and corners with three equivalent Cr(5)OF5 octahedra. The corner-sharing octahedral tilt angles range from 39-43°. The Cr(1)-O(1) bond length is 1.77 Å. The Cr(1)-F(1) bond length is 1.90 Å. The Cr(1)-F(2) bond length is 1.95 Å. The Cr(1)-F(5) bond length is 1.92 Å. The Cr(1)-F(6) bond length is 1.91 Å. The Cr(1)-F(8) bond length is 1.90 Å. In the second Cr site, Cr(2) is bonded to one F(10), one F(11), one F(3), one F(4), one F(7), and one F(9) atom to form CrF6 octahedra that share corners with three equivalent Cr(3)F6 octahedra and corners with three equivalent Cr(5)OF5 octahedra. The corner-sharing octahedral tilt angles range from 39-42°. The Cr(2)-F(10) bond length is 1.91 Å. The Cr(2)-F(11) bond length is 1.92 Å. The Cr(2)-F(3) bond length is 1.90 Å. The Cr(2)-F(4) bond length is 1.91 Å. The Cr(2)-F(7) bond length is 1.91 Å. The Cr(2)-F(9) bond length is 1.92 Å. In the third Cr site, Cr(3) is bonded to two equivalent F(10), two equivalent F(4), and two equivalent F(7) atoms to form corner-sharing CrF6 octahedra. The corner-sharing octahedral tilt angles are 40°. Both Cr(3)-F(10) bond lengths are 1.91 Å. Both Cr(3)-F(4) bond lengths are 1.91 Å. Both Cr(3)-F(7) bond lengths are 1.91 Å. In the fourth Cr site, Cr(4) is bonded to two equivalent F(2), two equivalent F(6), and two equivalent F(8) atoms to form corner-sharing CrF6 octahedra. The corner-sharing octahedral tilt angles range from 39-42°. Both Cr(4)-F(2) bond lengths are 1.90 Å. Both Cr(4)-F(6) bond lengths are 1.92 Å. Both Cr(4)-F(8) bond lengths are 1.92 Å. In the fifth Cr site, Cr(5) is bonded to one O(1), one F(1), one F(11), one F(3), one F(5), and one F(9) atom to form CrOF5 octahedra that share corners with three equivalent Cr(2)F6 octahedra and corners with three equivalent Cr(1)OF5 octahedra. The corner-sharing octahedral tilt angles range from 39-43°. The Cr(5)-O(1) bond length is 1.77 Å. The Cr(5)-F(1) bond length is 1.92 Å. The Cr(5)-F(11) bond length is 1.91 Å. The Cr(5)-F(3) bond length is 1.96 Å. The Cr(5)-F(5) bond length is 1.90 Å. The Cr(5)-F(9) bond length is 1.90 Å. O(1) is bonded in a bent 150 degrees geometry to one Cr(1) and one Cr(5) atom. There are eleven inequivalent F sites. In the first F site, F(1) is bonded in a bent 150 degrees geometry to one Cr(1) and one Cr(5) atom. In the second F site, F(2) is bonded in a bent 150 degrees geometry to one Cr(1) and one Cr(4) atom. In the third F site, F(3) is bonded in a bent 150 degrees geometry to one Cr(2) and one Cr(5) atom. In the fourth F site, F(4) is bonded in a bent 150 degrees geometry to one Cr(2) and one Cr(3) atom. In the fifth F site, F(5) is bonded in a bent 150 degrees geometry to one Cr(1) and one Cr(5) atom. In the sixth F site, F(6) is bonded in a bent 150 degrees geometry to one Cr(1) and one Cr(4) atom. In the seventh F site, F(7) is bonded in a bent 150 degrees geometry to one Cr(2) and one Cr(3) atom. In the eighth F site, F(8) is bonded in a bent 150 degrees geometry to one Cr(1) and one Cr(4) atom. In the ninth F site, F(9) is bonded in a bent 150 degrees geometry to one Cr(2) and one Cr(5) atom. In the tenth F site, F(10) is bonded in a bent 150 degrees geometry to one Cr(2) and one Cr(3) atom. In the eleventh F site, F(11) is bonded in a bent 150 degrees geometry to one Cr(2) and one Cr(5) atom.