Materials Data on Be12Co by Materials Project
Be12Co crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are three inequivalent Be sites. In the first Be site, Be is bonded to ten Be and two equivalent Co atoms to form a mixture of distorted face, edge, and corner-sharing BeBe10Co2 cuboctahedra. There are a spread of Be–Be bond distances ranging from 2.05–2.17 Å. Both Be–Co bond lengths are 2.73 Å. In the second Be site, Be is bonded in a 12-coordinate geometry to ten Be and two equivalent Co atoms. There are a spread of Be–Be bond distances ranging from 2.16–2.34 Å. Both Be–Co bond lengths are 2.55 Å. In the third Be site, Be is bonded in a 10-coordinate geometry to nine Be and one Co atom. The Be–Be bond length is 2.22 Å. The Be–Co bond length is 2.48 Å. Co is bonded in a 12-coordinate geometry to twenty Be atoms.