Materials Data on USb2 by Materials Project
USb2 crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. U6+ is bonded in a 9-coordinate geometry to nine Sb3- atoms. There are a spread of U–Sb bond distances ranging from 3.12–3.26 Å. There are two inequivalent Sb3- sites. In the first Sb3- site, Sb3- is bonded in a 8-coordinate geometry to four equivalent U6+ and four equivalent Sb3- atoms. All Sb–Sb bond lengths are 3.05 Å. In the second Sb3- site, Sb3- is bonded to five equivalent U6+ atoms to form a mixture of edge and corner-sharing SbU5 square pyramids.
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