KMnF3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. K(1) is bonded to four equivalent F(2) and eight equivalent F(1) atoms to form distorted KF12 cuboctahedra that share corners with twelve equivalent K(1)F12 cuboctahedra, faces with six equivalent K(1)F12 cuboctahedra, and faces with eight equivalent Mn(1)F6 octahedra. Mn(1) is bonded to two equivalent F(2) and four equivalent F(1) atoms to form MnF6 octahedra that share corners with six equivalent Mn(1)F6 octahedra and faces with eight equivalent K(1)F12 cuboctahedra. The corner-sharing octahedral tilt angles range from 12-14°. There are two inequivalent F sites. In the first F site, F(1) is bonded in a 2-coordinate geometry to four equivalent K(1) and two equivalent Mn(1) atoms. In the second F site, F(2) is bonded in a 2-coordinate geometry to four equivalent K(1) and two equivalent Mn(1) atoms.
KMnF3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. K(1) is bonded to four equivalent F(2) and eight equivalent F(1) atoms to form distorted KF12 cuboctahedra that share corners with twelve equivalent K(1)F12 cuboctahedra, faces with six equivalent K(1)F12 cuboctahedra, and faces with eight equivalent Mn(1)F6 octahedra. There are a spread of K(1)-F(2) bond distances ranging from 2.72-3.21 Å. There are a spread of K(1)-F(1) bond distances ranging from 2.75-3.21 Å. Mn(1) is bonded to two equivalent F(2) and four equivalent F(1) atoms to form MnF6 octahedra that share corners with six equivalent Mn(1)F6 octahedra and faces with eight equivalent K(1)F12 cuboctahedra. The corner-sharing octahedral tilt angles range from 12-14°. Both Mn(1)-F(2) bond lengths are 2.10 Å. All Mn(1)-F(1) bond lengths are 2.10 Å. There are two inequivalent F sites. In the first F site, F(1) is bonded in a 2-coordinate geometry to four equivalent K(1) and two equivalent Mn(1) atoms. In the second F site, F(2) is bonded in a 2-coordinate geometry to four equivalent K(1) and two equivalent Mn(1) atoms.