Materials Data on Pu2SiO10 by Materials Project

Abstract

Pu2SiO10 crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. Pu is bonded to seven O atoms to form distorted PuO7 pentagonal bipyramids that share corners with two equivalent SiO4 tetrahedra, edges with two equivalent PuO7 pentagonal bipyramids, and an edgeedge with one SiO4 tetrahedra. There are a spread of Pu–O bond distances ranging from 1.78–2.43 Å. Si is bonded to four equivalent O atoms to form SiO4 tetrahedra that share corners with four equivalent PuO7 pentagonal bipyramids and edges with two equivalent PuO7 pentagonal bipyramids. All Si–O bond lengths are 1.64 Å. There are three inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one Pu atom. In the second O site, O is bonded in a 1-coordinate geometry to two equivalent Pu and one Si atom. In the third O site, O is bonded in a single-bond geometry to one Pu atom.