Rb2O is Fluorite structured and crystallizes in the orthorhombic Pnnm space group. Rb(1) is bonded to four equivalent O(1) atoms to form a mixture of corner and edge-sharing RbO4 tetrahedra. O(1) is bonded in a body-centered cubic geometry to eight equivalent Rb(1) atoms.
Rb2O is Fluorite structured and crystallizes in the orthorhombic Pnnm space group. Rb(1) is bonded to four equivalent O(1) atoms to form a mixture of corner and edge-sharing RbO4 tetrahedra. There are three shorter (2.92 Å) and one longer (2.95 Å) Rb(1)-O(1) bond length. O(1) is bonded in a body-centered cubic geometry to eight equivalent Rb(1) atoms.