DOI: 10.17188/1723289
title: Materials Data on Mg5Bi by Materials Project

description: Mg5Bi crystallizes in the trigonal R32 space group. The structure is three-dimensional. there are eight inequivalent Mg sites. In the first Mg site, Mg is bonded to ten Mg and two equivalent Bi atoms to form distorted MgMg10Bi2 cuboctahedra that share corners with eighteen MgMg10Bi2 cuboctahedra, edges with four equivalent BiMg12 cuboctahedra, edges with fourteen MgMg10Bi2 cuboctahedra, faces with four equivalent BiMg12 cuboctahedra, and faces with sixteen MgMg10Bi2 cuboctahedra. There are a spread of Mg–Mg bond distances ranging from 3.23–3.27 Å. Both Mg–Bi bond lengths are 3.27 Å. In the second Mg site, Mg is bonded to nine Mg and three equivalent Bi atoms to form distorted MgMg9Bi3 cuboctahedra that share corners with six equivalent BiMg12 cuboctahedra, corners with twelve MgMg9Bi3 cuboctahedra, edges with eighteen MgMg10Bi2 cuboctahedra, faces with four equivalent BiMg12 cuboctahedra, and faces with sixteen MgMg10Bi2 cuboctahedra. There are three shorter (3.25 Å) and three longer (3.27 Å) Mg–Mg bond lengths. All Mg–Bi bond lengths are 3.25 Å. In the third Mg site, Mg is bonded to ten Mg and two equivalent Bi atoms to form distorted MgMg10Bi2 cuboctahedra that share corners with eighteen MgMg10Bi2 cuboctahedra, edges with four equivalent BiMg12 cuboctahedra, edges with fourteen MgMg9Bi3 cuboctahedra, faces with four equivalent BiMg12 cuboctahedra, and faces with sixteen MgMg10Bi2 cuboctahedra. There are a spread of Mg–Mg bond distances ranging from 3.23–3.27 Å. Both Mg–Bi bond lengths are 3.27 Å. In the fourth Mg site, Mg is bonded to ten Mg and two equivalent Bi atoms to form distorted MgMg10Bi2 cuboctahedra that share corners with eighteen MgMg10Bi2 cuboctahedra, edges with four equivalent BiMg12 cuboctahedra, edges with fourteen MgMg9Bi3 cuboctahedra, faces with four equivalent BiMg12 cuboctahedra, and faces with sixteen MgMg10Bi2 cuboctahedra. All Mg–Mg bond lengths are 3.27 Å. Both Mg–Bi bond lengths are 3.27 Å. In the fifth Mg site, Mg is bonded to nine Mg and three equivalent Bi atoms to form distorted MgMg9Bi3 cuboctahedra that share corners with six equivalent BiMg12 cuboctahedra, corners with twelve MgMg9Bi3 cuboctahedra, edges with eighteen MgMg10Bi2 cuboctahedra, faces with four equivalent BiMg12 cuboctahedra, and faces with sixteen MgMg10Bi2 cuboctahedra. All Mg–Bi bond lengths are 3.25 Å. In the sixth Mg site, Mg is bonded to nine Mg and three equivalent Bi atoms to form distorted MgMg9Bi3 cuboctahedra that share corners with six equivalent BiMg12 cuboctahedra, corners with twelve MgMg9Bi3 cuboctahedra, edges with eighteen MgMg10Bi2 cuboctahedra, faces with four equivalent BiMg12 cuboctahedra, and faces with sixteen MgMg10Bi2 cuboctahedra. There are three shorter (3.25 Å) and six longer (3.27 Å) Mg–Mg bond lengths. All Mg–Bi bond lengths are 3.25 Å. In the seventh Mg site, Mg is bonded to nine Mg and three equivalent Bi atoms to form distorted MgMg9Bi3 cuboctahedra that share corners with six equivalent BiMg12 cuboctahedra, corners with twelve MgMg9Bi3 cuboctahedra, edges with eighteen MgMg10Bi2 cuboctahedra, faces with four equivalent BiMg12 cuboctahedra, and faces with sixteen MgMg10Bi2 cuboctahedra. All Mg–Mg bond lengths are 3.25 Å. All Mg–Bi bond lengths are 3.25 Å. In the eighth Mg site, Mg is bonded to nine Mg and three equivalent Bi atoms to form distorted MgMg9Bi3 cuboctahedra that share corners with six equivalent BiMg12 cuboctahedra, corners with twelve MgMg9Bi3 cuboctahedra, edges with eighteen MgMg10Bi2 cuboctahedra, faces with four equivalent BiMg12 cuboctahedra, and faces with sixteen MgMg10Bi2 cuboctahedra. All Mg–Bi bond lengths are 3.25 Å. Bi is bonded to twelve Mg atoms to form BiMg12 cuboctahedra that share corners with six equivalent BiMg12 cuboctahedra, corners with twelve MgMg9Bi3 cuboctahedra, edges with six equivalent BiMg12 cuboctahedra, edges with twelve MgMg10Bi2 cuboctahedra, and faces with twenty MgMg10Bi2 cuboctahedra.