Materials Data on CeMg2 by Materials Project

Abstract

CeMg2 is alpha Samarium-derived structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Mg is bonded to nine equivalent Mg and three equivalent Ce atoms to form MgCe3Mg9 cuboctahedra that share corners with six equivalent CeCe6Mg6 cuboctahedra, corners with twelve equivalent MgCe3Mg9 cuboctahedra, edges with six equivalent CeCe6Mg6 cuboctahedra, edges with twelve equivalent MgCe3Mg9 cuboctahedra, faces with seven equivalent CeCe6Mg6 cuboctahedra, and faces with thirteen equivalent MgCe3Mg9 cuboctahedra. There are six shorter (3.14 Å) and three longer (3.27 Å) Mg–Mg bond lengths. All Mg–Ce bond lengths are 3.45 Å. Ce is bonded to six equivalent Mg and six equivalent Ce atoms to form CeCe6Mg6 cuboctahedra that share corners with six equivalent CeCe6Mg6 cuboctahedra, corners with twelve equivalent MgCe3Mg9 cuboctahedra, edges with six equivalent CeCe6Mg6 cuboctahedra, edges with twelve equivalent MgCe3Mg9 cuboctahedra, faces with six equivalent CeCe6Mg6 cuboctahedra, and faces with fourteen equivalent MgCe3Mg9 cuboctahedra. All Ce–Ce bond lengths are 3.14 Å.