CrO crystallizes in the orthorhombic Pmm2 space group. There are four inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. In the second Cr site, Cr(2) is bonded in a square co-planar geometry to four equivalent O(3) atoms. In the third Cr site, Cr(3) is bonded in a square co-planar geometry to four equivalent O(2) atoms. In the fourth Cr site, Cr(4) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a square co-planar geometry to two equivalent Cr(1) and two equivalent Cr(4) atoms. In the second O site, O(2) is bonded to two equivalent Cr(1) and two equivalent Cr(3) atoms to form a mixture of corner and edge-sharing OCr4 tetrahedra. In the third O site, O(3) is bonded to two equivalent Cr(2) and two equivalent Cr(4) atoms to form a mixture of corner and edge-sharing OCr4 tetrahedra.
CrO crystallizes in the orthorhombic Pmm2 space group. There are four inequivalent Cr sites. In the first Cr site, Cr(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Cr(1)-O(1) bond lengths are 2.09 Å. Both Cr(1)-O(2) bond lengths are 2.05 Å. In the second Cr site, Cr(2) is bonded in a square co-planar geometry to four equivalent O(3) atoms. There are two shorter (2.07 Å) and two longer (2.08 Å) Cr(2)-O(3) bond lengths. In the third Cr site, Cr(3) is bonded in a square co-planar geometry to four equivalent O(2) atoms. There are two shorter (2.07 Å) and two longer (2.08 Å) Cr(3)-O(2) bond lengths. In the fourth Cr site, Cr(4) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(3) atoms. Both Cr(4)-O(1) bond lengths are 2.08 Å. Both Cr(4)-O(3) bond lengths are 2.04 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a square co-planar geometry to two equivalent Cr(1) and two equivalent Cr(4) atoms. In the second O site, O(2) is bonded to two equivalent Cr(1) and two equivalent Cr(3) atoms to form a mixture of corner and edge-sharing OCr4 tetrahedra. In the third O site, O(3) is bonded to two equivalent Cr(2) and two equivalent Cr(4) atoms to form a mixture of corner and edge-sharing OCr4 tetrahedra.