Materials Data on Na2OsO7 by Materials Project
Na2OsO7 crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. there are two inequivalent Na sites. In the first Na site, Na is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Na–O bond distances ranging from 2.36–2.95 Å. In the second Na site, Na is bonded in a 4-coordinate geometry to four O atoms. There are a spread of Na–O bond distances ranging from 2.25–2.70 Å. Os is bonded in a distorted trigonal bipyramidal geometry to five O atoms. There are a spread of Os–O bond distances ranging from 1.75–1.83 Å. There are seven inequivalent O sites. In the first O site, O is bonded in a trigonal non-coplanar geometry to two Na and one Os atom. In the second O site, O is bonded in a distorted trigonal planar geometry to two Na and one Os atom. In the third O site, O is bonded in a distorted single-bond geometry to one Na and one Os atom. In the fourth O site, O is bonded in a 3-coordinate geometry to two Na and one Os atom. In the fifth O site, O is bonded in a single-bond geometry to one O atom. The O–O bond length is 1.24 Å. In the sixth O site, O is bonded in a distorted trigonal non-coplanar geometry to two Na and one Os atom. In the seventh O site, O is bonded in a water-like geometry to one Na and one O atom.