Materials Data on Al2Zn by Materials Project

ZnAl2 is alpha La-derived structured and crystallizes in the trigonal P-3m1 space group. The structure is three-dimensional. Zn is bonded to six equivalent Zn and six equivalent Al atoms to form ZnAl6Zn6 cuboctahedra that share corners with six equivalent ZnAl6Zn6 cuboctahedra, corners with six equivalent AlAl9Zn3 cuboctahedra, edges with six equivalent ZnAl6Zn6 cuboctahedra, edges with eighteen equivalent AlAl9Zn3 cuboctahedra, faces with six equivalent ZnAl6Zn6 cuboctahedra, and faces with twelve equivalent AlAl9Zn3 cuboctahedra. All Zn–Zn bond lengths are 2.83 Å. All Zn–Al bond lengths are 2.82 Å. Al is bonded to three equivalent Zn and nine equivalent Al atoms to form AlAl9Zn3 cuboctahedra that share corners with three equivalent ZnAl6Zn6 cuboctahedra, corners with nine equivalent AlAl9Zn3 cuboctahedra, edges with nine equivalent ZnAl6Zn6 cuboctahedra, edges with fifteen equivalent AlAl9Zn3 cuboctahedra, faces with six equivalent ZnAl6Zn6 cuboctahedra, and faces with twelve equivalent AlAl9Zn3 cuboctahedra. There are six shorter (2.83 Å) and three longer (2.85 Å) Al–Al bond lengths.