Rb2Cr2O5 crystallizes in the orthorhombic Ima2 space group. Rb(1) is bonded in a 9-coordinate geometry to one O(3), four equivalent O(1), and four equivalent O(2) atoms. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. In the second Cr site, Cr(2) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form corner-sharing CrO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to four equivalent Rb(1) and two equivalent Cr(1) atoms. In the second O site, O(2) is bonded in a distorted single-bond geometry to four equivalent Rb(1) and one Cr(2) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Rb(1) and two equivalent Cr(2) atoms.
Rb2Cr2O5 crystallizes in the orthorhombic Ima2 space group. Rb(1) is bonded in a 9-coordinate geometry to one O(3), four equivalent O(1), and four equivalent O(2) atoms. The Rb(1)-O(3) bond length is 3.06 Å. There are a spread of Rb(1)-O(1) bond distances ranging from 2.93-2.99 Å. There are a spread of Rb(1)-O(2) bond distances ranging from 2.84-3.40 Å. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. All Cr(1)-O(1) bond lengths are 1.96 Å. In the second Cr site, Cr(2) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form corner-sharing CrO4 tetrahedra. Both Cr(2)-O(2) bond lengths are 1.66 Å. There is one shorter (1.81 Å) and one longer (1.82 Å) Cr(2)-O(3) bond length. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to four equivalent Rb(1) and two equivalent Cr(1) atoms. In the second O site, O(2) is bonded in a distorted single-bond geometry to four equivalent Rb(1) and one Cr(2) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Rb(1) and two equivalent Cr(2) atoms.