K2Cr2O7 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 8-coordinate geometry to two equivalent O(4), three equivalent O(1), and three equivalent O(2) atoms. Cr(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form corner-sharing CrO4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to three equivalent K(1) and one Cr(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to three equivalent K(1) and one Cr(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to two equivalent Cr(1) atoms. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Cr(1) atom.
K2Cr2O7 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 8-coordinate geometry to two equivalent O(4), three equivalent O(1), and three equivalent O(2) atoms. There is one shorter (2.88 Å) and one longer (2.89 Å) K(1)-O(4) bond length. There are a spread of K(1)-O(1) bond distances ranging from 2.75-3.01 Å. There are a spread of K(1)-O(2) bond distances ranging from 2.74-2.79 Å. Cr(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form corner-sharing CrO4 tetrahedra. The Cr(1)-O(1) bond length is 1.62 Å. The Cr(1)-O(2) bond length is 1.62 Å. The Cr(1)-O(3) bond length is 1.77 Å. The Cr(1)-O(4) bond length is 1.61 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to three equivalent K(1) and one Cr(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to three equivalent K(1) and one Cr(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to two equivalent Cr(1) atoms. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Cr(1) atom.