Materials Data on MgBi5 by Materials Project

Abstract

MgBi5 crystallizes in the monoclinic C2 space group. The structure is three-dimensional. Mg is bonded to twelve Bi atoms to form a mixture of edge and corner-sharing MgBi12 cuboctahedra. There are a spread of Mg–Bi bond distances ranging from 3.44–3.56 Å. There are five inequivalent Bi sites. In the first Bi site, Bi is bonded in a distorted bent 150 degrees geometry to two equivalent Mg and four Bi atoms. There are two shorter (3.39 Å) and two longer (3.63 Å) Bi–Bi bond lengths. In the second Bi site, Bi is bonded in a distorted bent 150 degrees geometry to two equivalent Mg and four Bi atoms. There are a spread of Bi–Bi bond distances ranging from 3.40–3.64 Å. In the third Bi site, Bi is bonded in a 12-coordinate geometry to three equivalent Mg and nine Bi atoms. There are one shorter (3.54 Å) and two longer (3.55 Å) Bi–Bi bond lengths. In the fourth Bi site, Bi is bonded in a 12-coordinate geometry to three equivalent Mg and nine Bi atoms. In the fifth Bi site, Bi is bonded in a 12-coordinate geometry to three equivalent Mg and nine Bi atoms.