Materials Data on UCdO4 by Materials Project

Abstract

UCdO4 is Hydrophilite-derived structured and crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. U6+ is bonded to six O2- atoms to form UO6 octahedra that share corners with eight equivalent CdO6 octahedra and edges with two equivalent UO6 octahedra. The corner-sharing octahedra tilt angles range from 49–54°. There are two shorter (1.97 Å) and four longer (2.17 Å) U–O bond lengths. Cd2+ is bonded to six O2- atoms to form CdO6 octahedra that share corners with eight equivalent UO6 octahedra and edges with two equivalent CdO6 octahedra. The corner-sharing octahedra tilt angles range from 49–54°. There are four shorter (2.32 Å) and two longer (2.34 Å) Cd–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to one U6+ and two equivalent Cd2+ atoms. In the second O2- site, O2- is bonded in a trigonal planar geometry to two equivalent U6+ and one Cd2+ atom.