CsAsF4 crystallizes in the monoclinic P2_1 space group. Cs(1) is bonded in a 9-coordinate geometry to one F(2), two equivalent F(4), three equivalent F(1), and three equivalent F(3) atoms. As(1) is bonded in a rectangular see-saw-like geometry to one F(1), one F(2), one F(3), and one F(4) atom. There are four inequivalent F sites. In the first F site, F(1) is bonded to three equivalent Cs(1) and one As(1) atom to form a mixture of distorted corner and edge-sharing FCs3As tetrahedra. In the second F site, F(2) is bonded in a single-bond geometry to one Cs(1) and one As(1) atom. In the third F site, F(3) is bonded in a 4-coordinate geometry to three 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(1) atom.
CsAsF4 crystallizes in the monoclinic P2_1 space group. Cs(1) is bonded in a 9-coordinate geometry to one F(2), two equivalent F(4), three equivalent F(1), and three equivalent F(3) atoms. The Cs(1)-F(2) bond length is 3.26 Å. There is one shorter (3.13 Å) and one longer (3.16 Å) Cs(1)-F(4) bond length. There are a spread of Cs(1)-F(1) bond distances ranging from 3.03-3.09 Å. There are a spread of Cs(1)-F(3) bond distances ranging from 3.08-3.29 Å. As(1) is bonded in a rectangular see-saw-like geometry to one F(1), one F(2), one F(3), and one F(4) atom. The As(1)-F(1) bond length is 1.92 Å. The As(1)-F(2) bond length is 1.78 Å. The As(1)-F(3) bond length is 1.92 Å. The As(1)-F(4) bond length is 1.77 Å. There are four inequivalent F sites. In the first F site, F(1) is bonded to three equivalent Cs(1) and one As(1) atom to form a mixture of distorted corner and edge-sharing FCs3As tetrahedra. In the second F site, F(2) is bonded in a single-bond geometry to one Cs(1) and one As(1) atom. In the third F site, F(3) is bonded in a 4-coordinate geometry to three 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(1) atom.