Re2Rh2O5 crystallizes in the tetragonal P4/mmm space group. Re(1) is bonded in a 4-coordinate geometry to one O(2) and four equivalent O(1) atoms. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 8-coordinate geometry to eight equivalent O(1) atoms. In the second Rh site, Rh(2) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form a mixture of face and corner-sharing RhO12 cuboctahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to two equivalent Re(1), two equivalent Rh(1), and two equivalent Rh(2) atoms. In the second O site, O(2) is bonded to two equivalent Re(1) and four equivalent Rh(2) atoms to form a mixture of edge and corner-sharing ORe2Rh4 octahedra. The corner-sharing octahedra are not tilted.
Re2Rh2O5 crystallizes in the tetragonal P4/mmm space group. Re(1) is bonded in a 4-coordinate geometry to one O(2) and four equivalent O(1) atoms. The Re(1)-O(2) bond length is 2.57 Å. All Re(1)-O(1) bond lengths are 1.95 Å. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 8-coordinate geometry to eight equivalent O(1) atoms. All Rh(1)-O(1) bond lengths are 2.66 Å. In the second Rh site, Rh(2) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form a mixture of face and corner-sharing RhO12 cuboctahedra. All Rh(2)-O(2) bond lengths are 2.59 Å. All Rh(2)-O(1) bond lengths are 2.65 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to two equivalent Re(1), two equivalent Rh(1), and two equivalent Rh(2) atoms. In the second O site, O(2) is bonded to two equivalent Re(1) and four equivalent Rh(2) atoms to form a mixture of edge and corner-sharing ORe2Rh4 octahedra. The corner-sharing octahedra are not tilted.