Materials Data on RbUAuSe3 by Materials Project

Abstract

RbAuUSe3 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Rb1+ is bonded in a 10-coordinate geometry to two equivalent Au1- and eight Se2- atoms. Both Rb–Au bond lengths are 3.85 Å. There are a spread of Rb–Se bond distances ranging from 3.55–3.70 Å. U6+ is bonded to four equivalent Au1- and six Se2- atoms to form a mixture of corner and face-sharing UAu4Se6 octahedra. The corner-sharing octahedral tilt angles are 22°. All U–Au bond lengths are 3.49 Å. All U–Se bond lengths are 2.88 Å. Au1- is bonded in a 4-coordinate geometry to two equivalent Rb1+, four equivalent U6+, and four Se2- atoms. There are two shorter (2.57 Å) and two longer (2.70 Å) Au–Se bond lengths. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a 6-coordinate geometry to three equivalent Rb1+, two equivalent U6+, and one Au1- atom. In the second Se2- site, Se2- is bonded in a 6-coordinate geometry to two equivalent Rb1+, two equivalent U6+, and two equivalent Au1- atoms.