CsMnO4 crystallizes in the orthorhombic Pnma space group. Cs(1) is bonded to three equivalent O(2), three equivalent O(3), and six equivalent O(1) atoms to form distorted CsO12 cuboctahedra that share corners with two equivalent Mn(1)O4 tetrahedra, edges with six equivalent Cs(1)O12 cuboctahedra, edges with five equivalent Mn(1)O4 tetrahedra, and faces with four equivalent Cs(1)O12 cuboctahedra. Mn(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form MnO4 tetrahedra that share corners with two equivalent Cs(1)O12 cuboctahedra and edges with five equivalent Cs(1)O12 cuboctahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to three equivalent Cs(1) and one Mn(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to three equivalent Cs(1) and one Mn(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to three equivalent Cs(1) and one Mn(1) atom.
CsMnO4 crystallizes in the orthorhombic Pnma space group. Cs(1) is bonded to three equivalent O(2), three equivalent O(3), and six equivalent O(1) atoms to form distorted CsO12 cuboctahedra that share corners with two equivalent Mn(1)O4 tetrahedra, edges with six equivalent Cs(1)O12 cuboctahedra, edges with five equivalent Mn(1)O4 tetrahedra, and faces with four equivalent Cs(1)O12 cuboctahedra. There is one shorter (3.15 Å) and two longer (3.42 Å) Cs(1)-O(2) bond lengths. There is one shorter (3.16 Å) and two longer (3.41 Å) Cs(1)-O(3) bond lengths. There are a spread of Cs(1)-O(1) bond distances ranging from 3.09-3.17 Å. Mn(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form MnO4 tetrahedra that share corners with two equivalent Cs(1)O12 cuboctahedra and edges with five equivalent Cs(1)O12 cuboctahedra. The Mn(1)-O(2) bond length is 1.60 Å. The Mn(1)-O(3) bond length is 1.60 Å. Both Mn(1)-O(1) bond lengths are 1.61 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to three equivalent Cs(1) and one Mn(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to three equivalent Cs(1) and one Mn(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to three equivalent Cs(1) and one Mn(1) atom.