Materials Data on La2U3O11 by Materials Project
U3La2O11 crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. there are two inequivalent U+5.33+ sites. In the first U+5.33+ site, U+5.33+ is bonded in a 8-coordinate geometry to ten O2- atoms. There are a spread of U–O bond distances ranging from 2.18–2.64 Å. In the second U+5.33+ site, U+5.33+ is bonded in a body-centered cubic geometry to ten O2- atoms. There are a spread of U–O bond distances ranging from 2.25–2.80 Å. La3+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are a spread of La–O bond distances ranging from 2.40–2.54 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to three U+5.33+, one La3+, and one O2- atom to form a mixture of distorted edge, face, and corner-sharing OLaU3O tetrahedra. The O–O bond length is 2.36 Å. In the second O2- site, O2- is bonded to four U+5.33+ and two equivalent O2- atoms to form a mixture of edge, face, and corner-sharing OU4O2 tetrahedra. Both O–O bond lengths are 2.50 Å. In the third O2- site, O2- is bonded to one U+5.33+ and three equivalent La3+ atoms to form a mixture of distorted edge and corner-sharing OLa3U tetrahedra. In the fourth O2- site, O2- is bonded in a 4-coordinate geometry to six U+5.33+ and eight O2- atoms.