Cr3O5 crystallizes in the triclinic P1 space group. There are three inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form a mixture of edge and corner-sharing CrO5 trigonal bipyramids. In the second Cr site, Cr(2) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form a mixture of distorted edge, corner, and face-sharing CrO5 trigonal bipyramids. In the third Cr site, Cr(3) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form a mixture of distorted corner and face-sharing CrO5 trigonal bipyramids. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Cr(1), one Cr(2), and one Cr(3) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Cr(1), one Cr(2), and one Cr(3) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Cr(1), one Cr(2), and one Cr(3) atom. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Cr(1), one Cr(2), and one Cr(3) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Cr(1), one Cr(2), and one Cr(3) atom.
Cr3O5 crystallizes in the triclinic P1 space group. There are three inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form a mixture of edge and corner-sharing CrO5 trigonal bipyramids. The Cr(1)-O(1) bond length is 2.05 Å. The Cr(1)-O(2) bond length is 1.88 Å. The Cr(1)-O(3) bond length is 1.81 Å. The Cr(1)-O(4) bond length is 2.00 Å. The Cr(1)-O(5) bond length is 1.79 Å. In the second Cr site, Cr(2) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form a mixture of distorted edge, corner, and face-sharing CrO5 trigonal bipyramids. The Cr(2)-O(1) bond length is 1.94 Å. The Cr(2)-O(2) bond length is 1.94 Å. The Cr(2)-O(3) bond length is 2.07 Å. The Cr(2)-O(4) bond length is 1.90 Å. The Cr(2)-O(5) bond length is 1.98 Å. In the third Cr site, Cr(3) is bonded to one O(1), one O(2), one O(3), one O(4), and one O(5) atom to form a mixture of distorted corner and face-sharing CrO5 trigonal bipyramids. The Cr(3)-O(1) bond length is 1.94 Å. The Cr(3)-O(2) bond length is 2.01 Å. The Cr(3)-O(3) bond length is 2.00 Å. The Cr(3)-O(4) bond length is 1.99 Å. The Cr(3)-O(5) bond length is 2.03 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Cr(1), one Cr(2), and one Cr(3) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Cr(1), one Cr(2), and one Cr(3) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Cr(1), one Cr(2), and one Cr(3) atom. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Cr(1), one Cr(2), and one Cr(3) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Cr(1), one Cr(2), and one Cr(3) atom.