LaMnO3 crystallizes in the monoclinic P2_1/c space group. La(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted LaO6 octahedra that share edges with three equivalent La(1)O6 octahedra and edges with three equivalent Mn(1)O6 octahedra. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share edges with six equivalent La(1)O6 octahedra. In the second Mn site, Mn(2) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent La(1), one Mn(1), and one Mn(2) atom to form distorted corner-sharing OLa2Mn2 trigonal pyramids. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to two equivalent La(1), one Mn(1), and one Mn(2) atom. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to two equivalent La(1) and one Mn(1) atom.
LaMnO3 crystallizes in the monoclinic P2_1/c space group. La(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted LaO6 octahedra that share edges with three equivalent La(1)O6 octahedra and edges with three equivalent Mn(1)O6 octahedra. There is one shorter (2.59 Å) and one longer (2.66 Å) La(1)-O(1) bond length. There is one shorter (2.45 Å) and one longer (2.50 Å) La(1)-O(2) bond length. There is one shorter (2.26 Å) and one longer (2.33 Å) La(1)-O(3) bond length. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share edges with six equivalent La(1)O6 octahedra. Both Mn(1)-O(1) bond lengths are 1.96 Å. Both Mn(1)-O(2) bond lengths are 2.23 Å. Both Mn(1)-O(3) bond lengths are 2.03 Å. In the second Mn site, Mn(2) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Mn(2)-O(1) bond lengths are 1.97 Å. Both Mn(2)-O(2) bond lengths are 1.95 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent La(1), one Mn(1), and one Mn(2) atom to form distorted corner-sharing OLa2Mn2 trigonal pyramids. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to two equivalent La(1), one Mn(1), and one Mn(2) atom. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to two equivalent La(1) and one Mn(1) atom.