Materials Data on U3O8 by Materials Project

Abstract

U3O8 crystallizes in the hexagonal P-62m space group. The structure is three-dimensional. U+5.33+ is bonded to six O2- atoms to form distorted corner-sharing UO6 octahedra. The corner-sharing octahedra tilt angles range from 2–60°. There are a spread of U–O bond distances ranging from 2.08–2.22 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent U+5.33+ atoms. In the second O2- site, O2- is bonded in a linear geometry to two equivalent U+5.33+ atoms. In the third O2- site, O2- is bonded in a trigonal planar geometry to three equivalent U+5.33+ atoms.