Cs2As2OF10 crystallizes in the monoclinic P2_1/m space group. Cs(1) is bonded in a 10-coordinate geometry to one F(4), one F(6), one F(7), two equivalent F(1), two equivalent F(3), and three equivalent F(2) atoms. There are two inequivalent As sites. In the first As site, As(1) is bonded to one O(1), one F(7), two equivalent F(1), and two equivalent F(3) atoms to form corner-sharing AsOF5 octahedra. The corner-sharing octahedral tilt angles are 47°. In the second As site, As(2) is bonded to one O(1), one F(4), one F(5), one F(6), and two equivalent F(2) atoms to form corner-sharing AsOF5 octahedra. The corner-sharing octahedral tilt angles are 47°. O(1) is bonded in a distorted bent 120 degrees geometry to one As(1) and one As(2) atom. There are seven inequivalent F sites. In the first F site, F(1) is bonded in a single-bond geometry to two equivalent Cs(1) and one As(1) atom. In the second F site, F(2) is bonded in a single-bond geometry to three equivalent Cs(1) and one As(2) atom. In the third F site, F(3) is bonded in a single-bond geometry to two equivalent Cs(1) and one As(1) atom. In the fourth F site, F(4) is bonded in a single-bond geometry to two equivalent Cs(1) and one As(2) atom. In the fifth F site, F(5) is bonded in a single-bond geometry to one As(2) atom. In the sixth F site, F(6) is bonded in a single-bond geometry to two equivalent Cs(1) and one As(2) atom. In the seventh F site, F(7) is bonded in a single-bond geometry to two equivalent Cs(1) and one As(1) atom.
Cs2As2OF10 crystallizes in the monoclinic P2_1/m space group. Cs(1) is bonded in a 10-coordinate geometry to one F(4), one F(6), one F(7), two equivalent F(1), two equivalent F(3), and three equivalent F(2) atoms. The Cs(1)-F(4) bond length is 3.21 Å. The Cs(1)-F(6) bond length is 3.23 Å. The Cs(1)-F(7) bond length is 3.37 Å. There is one shorter (3.19 Å) and one longer (3.27 Å) Cs(1)-F(1) bond length. Both Cs(1)-F(3) bond lengths are 3.19 Å. There are a spread of Cs(1)-F(2) bond distances ranging from 3.29-3.33 Å. There are two inequivalent As sites. In the first As site, As(1) is bonded to one O(1), one F(7), two equivalent F(1), and two equivalent F(3) atoms to form corner-sharing AsOF5 octahedra. The corner-sharing octahedral tilt angles are 47°. The As(1)-O(1) bond length is 1.81 Å. The As(1)-F(7) bond length is 1.79 Å. Both As(1)-F(1) bond lengths are 1.79 Å. Both As(1)-F(3) bond lengths are 1.79 Å. In the second As site, As(2) is bonded to one O(1), one F(4), one F(5), one F(6), and two equivalent F(2) atoms to form corner-sharing AsOF5 octahedra. The corner-sharing octahedral tilt angles are 47°. The As(2)-O(1) bond length is 1.80 Å. The As(2)-F(4) bond length is 1.77 Å. The As(2)-F(5) bond length is 1.78 Å. The As(2)-F(6) bond length is 1.80 Å. Both As(2)-F(2) bond lengths are 1.81 Å. O(1) is bonded in a distorted bent 120 degrees geometry to one As(1) and one As(2) atom. There are seven inequivalent F sites. In the first F site, F(1) is bonded in a single-bond geometry to two equivalent Cs(1) and one As(1) atom. In the second F site, F(2) is bonded in a single-bond geometry to three equivalent Cs(1) and one As(2) atom. In the third F site, F(3) is bonded in a single-bond geometry to two equivalent Cs(1) and one As(1) atom. In the fourth F site, F(4) is bonded in a single-bond geometry to two equivalent Cs(1) and one As(2) atom. In the fifth F site, F(5) is bonded in a single-bond geometry to one As(2) atom. In the sixth F site, F(6) is bonded in a single-bond geometry to two equivalent Cs(1) and one As(2) atom. In the seventh F site, F(7) is bonded in a single-bond geometry to two equivalent Cs(1) and one As(1) atom.