YO2 crystallizes in the monoclinic C2/c space group. Y(1) is bonded to six equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing YO6 pentagonal pyramids. O(1) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Y(1) atoms.
YO2 crystallizes in the monoclinic C2/c space group. Y(1) is bonded to six equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing YO6 pentagonal pyramids. There are four shorter (2.25 Å) and two longer (2.34 Å) Y(1)-O(1) bond lengths. O(1) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Y(1) atoms.