Materials Data on USiPbO6 by Materials Project
PbSiUO6 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. U6+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of U–O bond distances ranging from 1.87–2.64 Å. Pb2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Pb–O bond distances ranging from 2.35–3.01 Å. Si4+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Si–O bond distances ranging from 1.63–1.68 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent U6+ and one Si4+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one U6+ and one Pb2+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one U6+ and two equivalent Pb2+ atoms. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two equivalent Pb2+ and one Si4+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one U6+ and one Si4+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent U6+, one Pb2+, and one Si4+ atom.