NaMnO4 crystallizes in the orthorhombic Cmcm space group. Na(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form NaO6 octahedra that share corners with six equivalent Mn(1)O4 tetrahedra and edges with two equivalent Na(1)O6 octahedra. Mn(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form MnO4 tetrahedra that share corners with six equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-51°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one Mn(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Na(1) and one Mn(1) atom.
NaMnO4 crystallizes in the orthorhombic Cmcm space group. Na(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form NaO6 octahedra that share corners with six equivalent Mn(1)O4 tetrahedra and edges with two equivalent Na(1)O6 octahedra. Both Na(1)-O(2) bond lengths are 2.40 Å. All Na(1)-O(1) bond lengths are 2.41 Å. Mn(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form MnO4 tetrahedra that share corners with six equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-51°. Both Mn(1)-O(1) bond lengths are 1.63 Å. Both Mn(1)-O(2) bond lengths are 1.61 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one Mn(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Na(1) and one Mn(1) atom.