Materials Data on K2UO4 by Materials Project
K2UO4 is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. K1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.72–3.09 Å. U6+ is bonded to six O2- atoms to form corner-sharing UO6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are two shorter (1.95 Å) and four longer (2.18 Å) U–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 6-coordinate geometry to five equivalent K1+ and one U6+ atom. In the second O2- site, O2- is bonded in a distorted linear geometry to four equivalent K1+ and two equivalent U6+ atoms.
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