LiMn2O2F3 crystallizes in the monoclinic C2/c space group. Li(1) is bonded to two equivalent O(1), two equivalent F(1), and two equivalent F(2) atoms to form LiO2F4 octahedra that share corners with two equivalent Li(1)O2F4 octahedra, corners with six equivalent Mn(1)O3F3 octahedra, and edges with four equivalent Mn(1)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 46-58°. Mn(1) is bonded to three equivalent O(1), one F(1), and two equivalent F(2) atoms to form MnO3F3 octahedra that share corners with three equivalent Li(1)O2F4 octahedra, corners with four equivalent Mn(1)O3F3 octahedra,  an edgeedge with one Mn(1)O3F3 octahedra, edges with two equivalent Li(1)O2F4 octahedra, and  a faceface with one Mn(1)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 46-49°. O(1) is bonded to one Li(1) and three equivalent Mn(1) atoms to form a mixture of corner and edge-sharing OLiMn3 trigonal pyramids. There are two inequivalent F sites. In the first F site, F(1) is bonded in a rectangular see-saw-like geometry to two equivalent Li(1) and two equivalent Mn(1) atoms. In the second F site, F(2) is bonded in a distorted T-shaped geometry to one Li(1) and two equivalent Mn(1) atoms.
LiMn2O2F3 crystallizes in the monoclinic C2/c space group. Li(1) is bonded to two equivalent O(1), two equivalent F(1), and two equivalent F(2) atoms to form LiO2F4 octahedra that share corners with two equivalent Li(1)O2F4 octahedra, corners with six equivalent Mn(1)O3F3 octahedra, and edges with four equivalent Mn(1)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 46-58°. Both Li(1)-O(1) bond lengths are 2.29 Å. Both Li(1)-F(1) bond lengths are 2.04 Å. Both Li(1)-F(2) bond lengths are 2.05 Å. Mn(1) is bonded to three equivalent O(1), one F(1), and two equivalent F(2) atoms to form MnO3F3 octahedra that share corners with three equivalent Li(1)O2F4 octahedra, corners with four equivalent Mn(1)O3F3 octahedra,  an edgeedge with one Mn(1)O3F3 octahedra, edges with two equivalent Li(1)O2F4 octahedra, and  a faceface with one Mn(1)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 46-49°. There is one shorter (1.93 Å) and two longer (1.97 Å) Mn(1)-O(1) bond lengths. The Mn(1)-F(1) bond length is 2.25 Å. There is one shorter (1.93 Å) and one longer (2.19 Å) Mn(1)-F(2) bond length. O(1) is bonded to one Li(1) and three equivalent Mn(1) atoms to form a mixture of corner and edge-sharing OLiMn3 trigonal pyramids. There are two inequivalent F sites. In the first F site, F(1) is bonded in a rectangular see-saw-like geometry to two equivalent Li(1) and two equivalent Mn(1) atoms. In the second F site, F(2) is bonded in a distorted T-shaped geometry to one Li(1) and two equivalent Mn(1) atoms.