Materials Data on KU3 by Materials Project
KU3 is Magnesium tetraboride-like structured and crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. K is bonded in a 1-coordinate geometry to six U atoms. There are a spread of K–U bond distances ranging from 3.89–4.17 Å. There are three inequivalent U sites. In the first U site, U is bonded in a 8-coordinate geometry to two equivalent K and six U atoms. There are a spread of U–U bond distances ranging from 2.80–2.83 Å. In the second U site, U is bonded in a 8-coordinate geometry to two equivalent K and six U atoms. There are one shorter (2.80 Å) and two longer (2.82 Å) U–U bond lengths. In the third U site, U is bonded in a 8-coordinate geometry to two equivalent K and six U atoms.
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