K2FeH2OF5 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 7-coordinate geometry to two equivalent F(1), two equivalent F(2), and three equivalent F(3) atoms. Fe(1) is bonded in an octahedral geometry to one O(1), one F(1), two equivalent F(2), and two equivalent F(3) atoms. H(1) is bonded in a distorted linear geometry to one O(1) and one F(2) atom. O(1) is bonded in a distorted bent 120 degrees geometry to one Fe(1) and two equivalent H(1) 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 K(1) and one Fe(1) atom. In the second F site, F(2) is bonded in a 4-coordinate geometry to two equivalent K(1), one Fe(1), and one H(1) atom. In the third F site, F(3) is bonded in a 4-coordinate geometry to three equivalent K(1) and one Fe(1) atom.
K2FeH2OF5 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 7-coordinate geometry to two equivalent F(1), two equivalent F(2), and three equivalent F(3) atoms. There is one shorter (2.81 Å) and one longer (2.90 Å) K(1)-F(1) bond length. There is one shorter (2.71 Å) and one longer (2.79 Å) K(1)-F(2) bond length. There are a spread of K(1)-F(3) bond distances ranging from 2.72-2.83 Å. Fe(1) is bonded in an octahedral geometry to one O(1), one F(1), two equivalent F(2), and two equivalent F(3) atoms. The Fe(1)-O(1) bond length is 2.07 Å. The Fe(1)-F(1) bond length is 1.95 Å. Both Fe(1)-F(2) bond lengths are 1.98 Å. Both Fe(1)-F(3) bond lengths are 1.94 Å. H(1) is bonded in a distorted linear geometry to one O(1) and one F(2) atom. The H(1)-O(1) bond length is 1.00 Å. The H(1)-F(2) bond length is 1.57 Å. O(1) is bonded in a distorted bent 120 degrees geometry to one Fe(1) and two equivalent H(1) 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 K(1) and one Fe(1) atom. In the second F site, F(2) is bonded in a 4-coordinate geometry to two equivalent K(1), one Fe(1), and one H(1) atom. In the third F site, F(3) is bonded in a 4-coordinate geometry to three equivalent K(1) and one Fe(1) atom.