Materials Data on YW2O9 by Materials Project
YW2O9 crystallizes in the monoclinic P2_1/m space group. The structure is three-dimensional. Y is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Y–O bond distances ranging from 2.29–2.54 Å. W is bonded to six O atoms to form distorted edge-sharing WO6 octahedra. There are a spread of W–O bond distances ranging from 1.81–2.14 Å. There are six inequivalent O sites. In the first O site, O is bonded in a water-like geometry to two equivalent W atoms. In the second O site, O is bonded in a trigonal non-coplanar geometry to one Y and two equivalent W atoms. In the third O site, O is bonded in a bent 150 degrees geometry to one Y and one W atom. In the fourth O site, O is bonded in a distorted trigonal non-coplanar geometry to one Y and two equivalent W atoms. In the fifth O site, O is bonded in a linear geometry to one Y and one W atom. In the sixth O site, O is bonded in a single-bond geometry to one Y atom.