Materials Data on La(Al10V)2 by Materials Project

Abstract

LaV2Al20 crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. La is bonded in a 4-coordinate geometry to sixteen Al atoms. There are four shorter (3.16 Å) and twelve longer (3.25 Å) La–Al bond lengths. V is bonded to twelve Al atoms to form VAl12 cuboctahedra that share corners with six equivalent VAl12 cuboctahedra, edges with eighteen equivalent AlLaAl10V cuboctahedra, and faces with six equivalent AlLaAl10V cuboctahedra. There are six shorter (2.59 Å) and six longer (2.81 Å) V–Al bond lengths. There are three inequivalent Al sites. In the first Al site, Al is bonded in a 12-coordinate geometry to two equivalent V and ten Al atoms. There are a spread of Al–Al bond distances ranging from 2.73–2.86 Å. In the second Al site, Al is bonded in a linear geometry to two equivalent La and twelve equivalent Al atoms. All Al–Al bond lengths are 3.13 Å. In the third Al site, Al is bonded to one La, one V, and ten Al atoms to form distorted AlLaAl10V cuboctahedra that share corners with fifteen equivalent AlLaAl10V cuboctahedra, edges with two equivalent AlLaAl10V cuboctahedra, edges with three equivalent VAl12 cuboctahedra, a faceface with one VAl12 cuboctahedra, and faces with fifteen equivalent AlLaAl10V cuboctahedra. There are a spread of Al–Al bond distances ranging from 2.73–2.92 Å.