Materials Data on SrU2(AsO10)2 by Materials Project

SrU2(AsO9)2O2 crystallizes in the monoclinic P2/c space group. The structure is three-dimensional and consists of two oxygen molecules and one SrU2(AsO9)2 framework. In the SrU2(AsO9)2 framework, Sr is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Sr–O bond distances ranging from 2.50–2.83 Å. U is bonded to six O atoms to form UO6 octahedra that share corners with four equivalent AsO4 tetrahedra. There are a spread of U–O bond distances ranging from 1.81–2.33 Å. As is bonded to four O atoms to form AsO4 tetrahedra that share corners with four equivalent UO6 octahedra. The corner-sharing octahedra tilt angles range from 35–45°. There is two shorter (1.71 Å) and two longer (1.73 Å) As–O bond length. There are nine inequivalent O sites. In the first O site, O is bonded in a bent 150 degrees geometry to one Sr and one O atom. The O–O bond length is 1.23 Å. In the second O site, O is bonded in a distorted water-like geometry to two O atoms. The O–O bond length is 1.83 Å. In the third O site, O is bonded in a single-bond geometry to one U atom. In the fourth O site, O is bonded in a single-bond geometry to one Sr atom. In the fifth O site, O is bonded in a bent 120 degrees geometry to one Sr and one U atom. In the sixth O site, O is bonded in a 3-coordinate geometry to one Sr, one U, and one As atom. In the seventh O site, O is bonded in a bent 150 degrees geometry to one U and one As atom. In the eighth O site, O is bonded in a bent 150 degrees geometry to one U and one As atom. In the ninth O site, O is bonded in a bent 150 degrees geometry to one U and one As atom.