Cu2Al3 crystallizes in the trigonal P-3m1 space group. Cu(1) is bonded in a body-centered cubic geometry to three equivalent Al(1) and five equivalent Al(2) atoms. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 6-coordinate geometry to six equivalent Cu(1) atoms. In the second Al site, Al(2) is bonded in a 5-coordinate geometry to five equivalent Cu(1) atoms.
Cu2Al3 crystallizes in the trigonal P-3m1 space group. Cu(1) is bonded in a body-centered cubic geometry to three equivalent Al(1) and five equivalent Al(2) atoms. All Cu(1)-Al(1) bond lengths are 2.49 Å. There are a spread of Cu(1)-Al(2) bond distances ranging from 2.44-2.55 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 6-coordinate geometry to six equivalent Cu(1) atoms. In the second Al site, Al(2) is bonded in a 5-coordinate geometry to five equivalent Cu(1) atoms.