(Cs2FeF5)2H2 crystallizes in the orthorhombic Cmcm space group. The structure consists of four 1333-74-0 atoms inside a Cs2FeF5 framework. In the Cs2FeF5 framework, Cs(1) is bonded in a 10-coordinate geometry to two equivalent F(2), four equivalent F(1), and four equivalent F(3) atoms. Fe(1) is bonded in a trigonal bipyramidal geometry to one F(2), two equivalent F(1), and two equivalent F(3) atoms. There are three inequivalent F sites. In the first F site, F(1) is bonded in a distorted single-bond geometry to four equivalent Cs(1) and one Fe(1) atom. In the second F site, F(2) is bonded in a single-bond geometry to four equivalent Cs(1) and one Fe(1) atom. In the third F site, F(3) is bonded in a single-bond geometry to four equivalent Cs(1) and one Fe(1) atom.
(Cs2FeF5)2H2 crystallizes in the orthorhombic Cmcm space group. The structure consists of four 1333-74-0 atoms inside a Cs2FeF5 framework. In the Cs2FeF5 framework, Cs(1) is bonded in a 10-coordinate geometry to two equivalent F(2), four equivalent F(1), and four equivalent F(3) atoms. Both Cs(1)-F(2) bond lengths are 3.23 Å. There are two shorter (3.05 Å) and two longer (3.43 Å) Cs(1)-F(1) bond lengths. There are two shorter (3.20 Å) and two longer (3.50 Å) Cs(1)-F(3) bond lengths. Fe(1) is bonded in a trigonal bipyramidal geometry to one F(2), two equivalent F(1), and two equivalent F(3) atoms. The Fe(1)-F(2) bond length is 1.89 Å. Both Fe(1)-F(1) bond lengths are 1.93 Å. Both Fe(1)-F(3) bond lengths are 1.92 Å. There are three inequivalent F sites. In the first F site, F(1) is bonded in a distorted single-bond geometry to four equivalent Cs(1) and one Fe(1) atom. In the second F site, F(2) is bonded in a single-bond geometry to four equivalent Cs(1) and one Fe(1) atom. In the third F site, F(3) is bonded in a single-bond geometry to four equivalent Cs(1) and one Fe(1) atom.