Materials Data on YbBi2BrO4 by Materials Project

Abstract

YbBi2O4Br is alpha bismuth trifluoride-derived structured and crystallizes in the tetragonal P4mm space group. The structure is three-dimensional. Yb3+ is bonded in a body-centered cubic geometry to eight O2- atoms. There are four shorter (2.41 Å) and four longer (2.42 Å) Yb–O bond lengths. There are two inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded in a 4-coordinate geometry to four equivalent O2- and four equivalent Br1- atoms. All Bi–O bond lengths are 2.22 Å. All Bi–Br bond lengths are 3.56 Å. In the second Bi3+ site, Bi3+ is bonded in a 4-coordinate geometry to four equivalent O2- and four equivalent Br1- atoms. All Bi–O bond lengths are 2.22 Å. All Bi–Br bond lengths are 3.56 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Yb3+ and two equivalent Bi3+ atoms to form a mixture of edge and corner-sharing OYb2Bi2 tetrahedra. In the second O2- site, O2- is bonded to two equivalent Yb3+ and two equivalent Bi3+ atoms to form a mixture of edge and corner-sharing OYb2Bi2 tetrahedra. Br1- is bonded in a body-centered cubic geometry to eight Bi3+ atoms.