Materials Data on U3O5 by Materials Project
U3O5 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are three inequivalent U+3.33+ sites. In the first U+3.33+ site, U+3.33+ is bonded to five O2- atoms to form distorted corner-sharing UO5 trigonal bipyramids. There are a spread of U–O bond distances ranging from 2.24–2.28 Å. In the second U+3.33+ site, U+3.33+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of U–O bond distances ranging from 2.29–2.43 Å. In the third U+3.33+ site, U+3.33+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are a spread of U–O bond distances ranging from 2.35–2.59 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded to four U+3.33+ atoms to form a mixture of edge and corner-sharing OU4 tetrahedra. In the second O2- site, O2- is bonded to four U+3.33+ atoms to form a mixture of edge and corner-sharing OU4 tetrahedra. In the third O2- site, O2- is bonded to four U+3.33+ atoms to form a mixture of edge and corner-sharing OU4 tetrahedra. In the fourth O2- site, O2- is bonded to four U+3.33+ atoms to form a mixture of edge and corner-sharing OU4 tetrahedra. In the fifth O2- site, O2- is bonded to four U+3.33+ atoms to form a mixture of distorted edge and corner-sharing OU4 tetrahedra.