Materials Data on Be22W by Materials Project
Be22W crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. there are four inequivalent Be sites. In the first Be site, Be is bonded to twelve Be atoms to form a mixture of edge, face, and corner-sharing BeBe12 cuboctahedra. There are six shorter (2.05 Å) and six longer (2.26 Å) Be–Be bond lengths. In the second Be site, Be is bonded in a distorted linear geometry to twelve equivalent Be and two equivalent W atoms. All Be–Be bond lengths are 2.46 Å. Both Be–W bond lengths are 2.50 Å. In the third Be site, Be is bonded to twelve Be atoms to form a mixture of distorted edge, face, and corner-sharing BeBe12 cuboctahedra. There are a spread of Be–Be bond distances ranging from 2.19–2.29 Å. In the fourth Be site, Be is bonded to eleven Be and one W atom to form a mixture of distorted edge, face, and corner-sharing BeBe11W cuboctahedra. There are a spread of Be–Be bond distances ranging from 2.13–2.35 Å. The Be–W bond length is 2.54 Å. W is bonded in a 4-coordinate geometry to sixteen Be atoms.