Materials Data on YbAl7Cu5 by Materials Project
YbCu5Al7 crystallizes in the orthorhombic Imm2 space group. The structure is three-dimensional. Yb is bonded in a 12-coordinate geometry to ten Cu and ten Al atoms. There are a spread of Yb–Cu bond distances ranging from 3.16–3.34 Å. There are a spread of Yb–Al bond distances ranging from 2.97–3.21 Å. There are two inequivalent Cu sites. In the first Cu site, Cu is bonded in a 12-coordinate geometry to two equivalent Yb, three Cu, and seven Al atoms. There are a spread of Cu–Cu bond distances ranging from 2.53–2.57 Å. There are a spread of Cu–Al bond distances ranging from 2.50–2.71 Å. In the second Cu site, Cu is bonded in a 12-coordinate geometry to two equivalent Yb, four equivalent Cu, and six Al atoms. There are a spread of Cu–Al bond distances ranging from 2.64–2.76 Å. There are five inequivalent Al sites. In the first Al site, Al is bonded in a 10-coordinate geometry to one Yb, four equivalent Cu, and five Al atoms. There are a spread of Al–Al bond distances ranging from 2.65–2.82 Å. In the second Al site, Al is bonded in a 8-coordinate geometry to one Yb, six Cu, and three Al atoms. Both Al–Al bond lengths are 2.88 Å. In the third Al site, Al is bonded in a 10-coordinate geometry to one Yb, five Cu, and four Al atoms. There are a spread of Al–Al bond distances ranging from 2.65–2.81 Å. In the fourth Al site, Al is bonded in a 12-coordinate geometry to two equivalent Yb, four equivalent Cu, and six Al atoms. Both Al–Al bond lengths are 2.73 Å. In the fifth Al site, Al is bonded in a 12-coordinate geometry to two equivalent Yb, five Cu, and five Al atoms.