Materials Data on MgZn3 by Materials Project

Abstract

MgZn3 crystallizes in the hexagonal P-6m2 space group. The structure is three-dimensional. Mg is bonded to six equivalent Mg and six equivalent Zn atoms to form distorted MgMg6Zn6 cuboctahedra that share corners with six equivalent MgMg6Zn6 cuboctahedra, corners with twelve equivalent ZnZn12 cuboctahedra, edges with six equivalent MgMg6Zn6 cuboctahedra, edges with twelve equivalent ZnMg3Zn9 cuboctahedra, faces with six equivalent MgMg6Zn6 cuboctahedra, and faces with fourteen ZnZn12 cuboctahedra. All Mg–Mg bond lengths are 2.98 Å. All Mg–Zn bond lengths are 2.86 Å. There are two inequivalent Zn sites. In the first Zn site, Zn is bonded to twelve Zn atoms to form ZnZn12 cuboctahedra that share corners with six equivalent ZnZn12 cuboctahedra, corners with twelve equivalent MgMg6Zn6 cuboctahedra, edges with eighteen ZnZn12 cuboctahedra, faces with two equivalent MgMg6Zn6 cuboctahedra, and faces with eighteen ZnZn12 cuboctahedra. There are six shorter (2.72 Å) and six longer (2.98 Å) Zn–Zn bond lengths. In the second Zn site, Zn is bonded to three equivalent Mg and nine Zn atoms to form distorted ZnMg3Zn9 cuboctahedra that share corners with eighteen equivalent ZnMg3Zn9 cuboctahedra, edges with six equivalent MgMg6Zn6 cuboctahedra, edges with twelve ZnZn12 cuboctahedra, faces with six equivalent MgMg6Zn6 cuboctahedra, and faces with fourteen ZnZn12 cuboctahedra. All Zn–Zn bond lengths are 2.98 Å.