YO2 crystallizes in the monoclinic P2_1/c space group. Y(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form a mixture of distorted edge and corner-sharing YO6 pentagonal pyramids. There are two inequivalent O sites. In the first O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Y(1) atoms. In the second O site, O(1) is bonded in a distorted T-shaped geometry to three equivalent Y(1) atoms.
YO2 crystallizes in the monoclinic P2_1/c space group. Y(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form a mixture of distorted edge and corner-sharing YO6 pentagonal pyramids. There are two shorter (2.25 Å) and one longer (2.34 Å) Y(1)-O(1) bond length. There are a spread of Y(1)-O(2) bond distances ranging from 2.24-2.34 Å. There are two inequivalent O sites. In the first O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Y(1) atoms. In the second O site, O(1) is bonded in a distorted T-shaped geometry to three equivalent Y(1) atoms.