Materials Data on RbOs2O9 by Materials Project
RbOs2O9 crystallizes in the orthorhombic Pna2_1 space group. The structure is three-dimensional. Rb is bonded in a 10-coordinate geometry to fourteen O atoms. There are a spread of Rb–O bond distances ranging from 3.09–3.58 Å. There are two inequivalent Os sites. In the first Os site, Os is bonded to five O atoms to form distorted corner-sharing OsO5 trigonal bipyramids. There are a spread of Os–O bond distances ranging from 1.74–2.21 Å. In the second Os site, Os is bonded to five O atoms to form distorted corner-sharing OsO5 trigonal bipyramids. There are a spread of Os–O bond distances ranging from 1.74–2.26 Å. There are nine inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to two equivalent Rb and one Os atom. In the second O site, O is bonded in a single-bond geometry to two equivalent Rb and one Os atom. In the third O site, O is bonded in a single-bond geometry to one Rb and one Os atom. In the fourth O site, O is bonded in a single-bond geometry to two equivalent Rb and one Os atom. In the fifth O site, O is bonded in a 2-coordinate geometry to one Rb and two Os atoms. In the sixth O site, O is bonded in a distorted single-bond geometry to two equivalent Rb and one Os atom. In the seventh O site, O is bonded in a single-bond geometry to two equivalent Rb and one Os atom. In the eighth O site, O is bonded in a single-bond geometry to one Rb and one Os atom. In the ninth O site, O is bonded in a distorted single-bond geometry to one Rb and one Os atom.