Cs2O crystallizes in the orthorhombic Pnnm space group. Cs(1) is bonded in a distorted trigonal planar geometry to three equivalent O(1) atoms. O(1) is bonded to six equivalent Cs(1) atoms to form a mixture of distorted corner and edge-sharing OCs6 octahedra. The corner-sharing octahedral tilt angles are 59°.
Cs2O crystallizes in the orthorhombic Pnnm space group. Cs(1) is bonded in a distorted trigonal planar geometry to three equivalent O(1) atoms. There are two shorter (2.85 Å) and one longer (3.18 Å) Cs(1)-O(1) bond length. O(1) is bonded to six equivalent Cs(1) atoms to form a mixture of distorted corner and edge-sharing OCs6 octahedra. The corner-sharing octahedral tilt angles are 59°.