Materials Data on Th5Pb4 by Materials Project

Abstract

Th5Pb4 crystallizes in the hexagonal P6_3/mcm space group. The structure is three-dimensional. there are two inequivalent Th sites. In the first Th site, Th is bonded in a 6-coordinate geometry to six equivalent Pb atoms. All Th–Pb bond lengths are 3.50 Å. In the second Th site, Th is bonded to seven Pb atoms to form a mixture of distorted corner, edge, and face-sharing ThPb7 pentagonal bipyramids. There are a spread of Th–Pb bond distances ranging from 3.25–3.45 Å. There are two inequivalent Pb sites. In the first Pb site, Pb is bonded to six equivalent Th atoms to form distorted face-sharing PbTh6 octahedra. In the second Pb site, Pb is bonded in a 9-coordinate geometry to nine Th atoms.