Materials Data on Rb4PbO4 by Materials Project

Abstract

Rb4PbO4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are four inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Rb–O bond distances ranging from 2.85–3.40 Å. In the second Rb1+ site, Rb1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Rb–O bond distances ranging from 2.70–3.43 Å. In the third Rb1+ site, Rb1+ is bonded to four O2- atoms to form distorted RbO4 trigonal pyramids that share corners with four equivalent PbO4 tetrahedra and an edgeedge with one RbO4 trigonal pyramid. There are a spread of Rb–O bond distances ranging from 2.74–2.81 Å. In the fourth Rb1+ site, Rb1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Rb–O bond distances ranging from 2.97–3.07 Å. Pb4+ is bonded to four O2- atoms to form PbO4 tetrahedra that share corners with four equivalent RbO4 trigonal pyramids. There are three shorter (2.09 Å) and one longer (2.12 Å) Pb–O bond lengths. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to five Rb1+ and one Pb4+ atom to form a mixture of distorted corner and edge-sharing ORb5Pb octahedra. The corner-sharing octahedra tilt angles range from 45–46°. In the second O2- site, O2- is bonded in a 5-coordinate geometry to four Rb1+ and one Pb4+ atom. In the third O2- site, O2- is bonded in a 6-coordinate geometry to five Rb1+ and one Pb4+ atom. In the fourth O2- site, O2- is bonded in a 6-coordinate geometry to five Rb1+ and one Pb4+ atom.