KMnF4 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 9-coordinate geometry to one F(4), two equivalent F(3), three equivalent F(1), and three equivalent F(2) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent F(2), two equivalent F(3), and two equivalent F(4) atoms to form corner-sharing MnF6 octahedra. The corner-sharing octahedral tilt angles range from 33-40°. In the second Mn site, Mn(2) is bonded to two equivalent F(1), two equivalent F(3), and two equivalent F(4) atoms to form corner-sharing MnF6 octahedra. The corner-sharing octahedral tilt angles range from 33-40°. There are four inequivalent F sites. In the first F site, F(1) is bonded in a distorted single-bond geometry to three equivalent K(1) and one Mn(2) atom. In the second F site, F(2) is bonded in a distorted single-bond geometry to three equivalent K(1) and one Mn(1) atom. In the third F site, F(3) is bonded in a 4-coordinate geometry to two equivalent K(1), one Mn(1), and one Mn(2) atom. In the fourth F site, F(4) is bonded in a 3-coordinate geometry to one K(1), one Mn(1), and one Mn(2) atom.
KMnF4 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 9-coordinate geometry to one F(4), two equivalent F(3), three equivalent F(1), and three equivalent F(2) atoms. The K(1)-F(4) bond length is 2.74 Å. There is one shorter (2.83 Å) and one longer (2.95 Å) K(1)-F(3) bond length. There are a spread of K(1)-F(1) bond distances ranging from 2.64-2.82 Å. There are a spread of K(1)-F(2) bond distances ranging from 2.66-2.92 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent F(2), two equivalent F(3), and two equivalent F(4) atoms to form corner-sharing MnF6 octahedra. The corner-sharing octahedral tilt angles range from 33-40°. Both Mn(1)-F(2) bond lengths are 1.82 Å. Both Mn(1)-F(3) bond lengths are 2.16 Å. Both Mn(1)-F(4) bond lengths are 1.89 Å. In the second Mn site, Mn(2) is bonded to two equivalent F(1), two equivalent F(3), and two equivalent F(4) atoms to form corner-sharing MnF6 octahedra. The corner-sharing octahedral tilt angles range from 33-40°. Both Mn(2)-F(1) bond lengths are 1.82 Å. Both Mn(2)-F(3) bond lengths are 1.90 Å. Both Mn(2)-F(4) bond lengths are 2.13 Å. There are four inequivalent F sites. In the first F site, F(1) is bonded in a distorted single-bond geometry to three equivalent K(1) and one Mn(2) atom. In the second F site, F(2) is bonded in a distorted single-bond geometry to three equivalent K(1) and one Mn(1) atom. In the third F site, F(3) is bonded in a 4-coordinate geometry to two equivalent K(1), one Mn(1), and one Mn(2) atom. In the fourth F site, F(4) is bonded in a 3-coordinate geometry to one K(1), one Mn(1), and one Mn(2) atom.