Ba3Au2 crystallizes in the trigonal R-3 space group. There are three inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in an octahedral geometry to six equivalent Au(1) atoms. In the second Ba site, Ba(2) is bonded in a 6-coordinate geometry to six equivalent Au(1) atoms. In the third Ba site, Ba(3) is bonded in a 5-coordinate geometry to five equivalent Au(1) atoms. Au(1) is bonded in a 8-coordinate geometry to one Ba(1), two equivalent Ba(2), and five equivalent Ba(3) atoms.
Ba3Au2 crystallizes in the trigonal R-3 space group. There are three inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in an octahedral geometry to six equivalent Au(1) atoms. All Ba(1)-Au(1) bond lengths are 3.49 Å. In the second Ba site, Ba(2) is bonded in a 6-coordinate geometry to six equivalent Au(1) atoms. There are three shorter (3.39 Å) and three longer (3.56 Å) Ba(2)-Au(1) bond lengths. In the third Ba site, Ba(3) is bonded in a 5-coordinate geometry to five equivalent Au(1) atoms. There are a spread of Ba(3)-Au(1) bond distances ranging from 3.36-3.68 Å. Au(1) is bonded in a 8-coordinate geometry to one Ba(1), two equivalent Ba(2), and five equivalent Ba(3) atoms.