Cs3Re2OCl10 crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded to four equivalent Cl(1) and eight equivalent Cl(2) atoms to form CsCl12 cuboctahedra that share corners with four equivalent Cs(1)Cl12 cuboctahedra, faces with four equivalent Cs(1)Cl12 cuboctahedra, and faces with four equivalent Re(1)Cl5O octahedra. In the second Cs site, Cs(2) is bonded in a body-centered cubic geometry to eight equivalent Cl(2) atoms. Re(1) is bonded to one O(1), one Cl(1), and four equivalent Cl(2) atoms to form ReCl5O octahedra that share  a cornercorner with one Re(1)Cl5O octahedra and faces with four equivalent Cs(1)Cl12 cuboctahedra. The corner-sharing octahedra are not tilted. O(1) is bonded in a linear geometry to two equivalent Re(1) atoms. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a single-bond geometry to four equivalent Cs(1) and one Re(1) atom. In the second Cl site, Cl(2) is bonded in a distorted single-bond geometry to one Cs(2), two equivalent Cs(1), and one Re(1) atom.
Cs3Re2OCl10 crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded to four equivalent Cl(1) and eight equivalent Cl(2) atoms to form CsCl12 cuboctahedra that share corners with four equivalent Cs(1)Cl12 cuboctahedra, faces with four equivalent Cs(1)Cl12 cuboctahedra, and faces with four equivalent Re(1)Cl5O octahedra. All Cs(1)-Cl(1) bond lengths are 3.81 Å. All Cs(1)-Cl(2) bond lengths are 3.68 Å. In the second Cs site, Cs(2) is bonded in a body-centered cubic geometry to eight equivalent Cl(2) atoms. All Cs(2)-Cl(2) bond lengths are 3.59 Å. Re(1) is bonded to one O(1), one Cl(1), and four equivalent Cl(2) atoms to form ReCl5O octahedra that share  a cornercorner with one Re(1)Cl5O octahedra and faces with four equivalent Cs(1)Cl12 cuboctahedra. The corner-sharing octahedra are not tilted. The Re(1)-O(1) bond length is 1.83 Å. The Re(1)-Cl(1) bond length is 2.39 Å. All Re(1)-Cl(2) bond lengths are 2.38 Å. O(1) is bonded in a linear geometry to two equivalent Re(1) atoms. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a single-bond geometry to four equivalent Cs(1) and one Re(1) atom. In the second Cl site, Cl(2) is bonded in a distorted single-bond geometry to one Cs(2), two equivalent Cs(1), and one Re(1) atom.