Materials Data on LiUF5 by Materials Project

Abstract

LiUF5 crystallizes in the tetragonal I4_1/a space group. The structure is three-dimensional. Li1+ is bonded to six F1- atoms to form distorted edge-sharing LiF6 octahedra. There are a spread of Li–F bond distances ranging from 1.92–2.35 Å. U4+ is bonded in a 9-coordinate geometry to nine F1- atoms. There are a spread of U–F bond distances ranging from 2.22–2.68 Å. There are five inequivalent F1- sites. In the first F1- site, F1- is bonded in a 1-coordinate geometry to one Li1+ and two equivalent U4+ atoms. In the second F1- site, F1- is bonded in a distorted rectangular see-saw-like geometry to three equivalent Li1+ and one U4+ atom. In the third F1- site, F1- is bonded in a 2-coordinate geometry to one Li1+ and two equivalent U4+ atoms. In the fourth F1- site, F1- is bonded in a distorted T-shaped geometry to one Li1+ and two equivalent U4+ atoms. In the fifth F1- site, F1- is bonded in a bent 150 degrees geometry to two equivalent U4+ atoms.