Materials Data on UC4O7 by Materials Project
UC4O7 is Magnesium structured and crystallizes in the orthorhombic Pbcn space group. The structure is zero-dimensional and consists of four UC4O7 clusters. U6+ is bonded in a distorted pentagonal bipyramidal geometry to seven O2- atoms. There are a spread of U–O bond distances ranging from 1.83–2.59 Å. There are two inequivalent C2+ sites. In the first C2+ site, C2+ is bonded in a single-bond geometry to one O2- atom. The C–O bond length is 1.23 Å. In the second C2+ site, C2+ is bonded in a single-bond geometry to one O2- atom. The C–O bond length is 1.23 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one U6+ and one C2+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one U6+ and one C2+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one U6+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one U6+ atom.