Materials Data on YU2O6 by Materials Project

Abstract

U2YO6 is Fluorite-derived structured and crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. U+4.50+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are a spread of U–O bond distances ranging from 2.28–2.33 Å. Y3+ is bonded in a body-centered cubic geometry to eight O2- atoms. All Y–O bond lengths are 2.37 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent U+4.50+ and two equivalent Y3+ atoms to form a mixture of edge and corner-sharing OY2U2 tetrahedra. In the second O2- site, O2- is bonded to three equivalent U+4.50+ and one Y3+ atom to form a mixture of edge and corner-sharing OYU3 tetrahedra.