Rb2HgO2 crystallizes in the tetragonal I4/mmm space group. Rb(1) is bonded to five equivalent O(1) atoms to form a mixture of edge and corner-sharing RbO5 square pyramids. Hg(1) is bonded in a linear geometry to two equivalent O(1) atoms. O(1) is bonded to five equivalent Rb(1) and one Hg(1) atom to form a mixture of distorted edge and corner-sharing ORb5Hg octahedra. The corner-sharing octahedral tilt angles range from 0-15°.
Rb2HgO2 crystallizes in the tetragonal I4/mmm space group. Rb(1) is bonded to five equivalent O(1) atoms to form a mixture of edge and corner-sharing RbO5 square pyramids. There is one shorter (2.77 Å) and four longer (2.96 Å) Rb(1)-O(1) bond lengths. Hg(1) is bonded in a linear geometry to two equivalent O(1) atoms. Both Hg(1)-O(1) bond lengths are 1.99 Å. O(1) is bonded to five equivalent Rb(1) and one Hg(1) atom to form a mixture of distorted edge and corner-sharing ORb5Hg octahedra. The corner-sharing octahedral tilt angles range from 0-15°.