Au9In4 is gamma-brass-like structured and crystallizes in the cubic P-43m space group. There are six inequivalent Au sites. In the first Au site, Au(1) is bonded in a 5-coordinate geometry to two equivalent Au(2), two equivalent Au(3), one In(1), and four equivalent In(2) atoms. In the second Au site, Au(2) is bonded in a 13-coordinate geometry to one Au(2), two equivalent Au(4), four equivalent Au(1), two equivalent In(1), and four equivalent In(2) atoms. In the third Au site, Au(3) is bonded in a 13-coordinate geometry to one Au(3), two equivalent Au(5), two equivalent Au(6), four equivalent Au(1), and four equivalent In(2) atoms. In the fourth Au site, Au(4) is bonded in a 6-coordinate geometry to three equivalent Au(2), three equivalent In(1), and three equivalent In(2) atoms. In the fifth Au site, Au(5) is bonded in a 3-coordinate geometry to three equivalent Au(3) and three equivalent In(2) atoms. In the sixth Au site, Au(6) is bonded in a distorted trigonal planar geometry to three equivalent Au(3) and three equivalent In(2) atoms. There are two inequivalent In sites. In the first In site, In(1) is bonded in a 9-coordinate geometry to three equivalent Au(1), three equivalent Au(2), and three equivalent Au(4) atoms. In the second In site, In(2) is bonded in a 11-coordinate geometry to one Au(4), one Au(5), one Au(6), two equivalent Au(2), two equivalent Au(3), and four equivalent Au(1) atoms.
Au9In4 is gamma-brass-like structured and crystallizes in the cubic P-43m space group. There are six inequivalent Au sites. In the first Au site, Au(1) is bonded in a 5-coordinate geometry to two equivalent Au(2), two equivalent Au(3), one In(1), and four equivalent In(2) atoms. Both Au(1)-Au(2) bond lengths are 3.22 Å. There is one shorter (2.85 Å) and one longer (3.16 Å) Au(1)-Au(3) bond length. The Au(1)-In(1) bond length is 2.87 Å. There are two shorter (2.98 Å) and two longer (3.02 Å) Au(1)-In(2) bond lengths. In the second Au site, Au(2) is bonded in a 13-coordinate geometry to one Au(2), two equivalent Au(4), four equivalent Au(1), two equivalent In(1), and four equivalent In(2) atoms. The Au(2)-Au(2) bond length is 2.80 Å. Both Au(2)-Au(4) bond lengths are 3.08 Å. Both Au(2)-In(1) bond lengths are 2.97 Å. There are two shorter (2.91 Å) and two longer (3.26 Å) Au(2)-In(2) bond lengths. In the third Au site, Au(3) is bonded in a 13-coordinate geometry to one Au(3), two equivalent Au(5), two equivalent Au(6), four equivalent Au(1), and four equivalent In(2) atoms. The Au(3)-Au(3) bond length is 2.80 Å. Both Au(3)-Au(5) bond lengths are 2.98 Å. Both Au(3)-Au(6) bond lengths are 3.12 Å. All Au(3)-In(2) bond lengths are 3.18 Å. In the fourth Au site, Au(4) is bonded in a 6-coordinate geometry to three equivalent Au(2), three equivalent In(1), and three equivalent In(2) atoms. All Au(4)-In(1) bond lengths are 2.99 Å. All Au(4)-In(2) bond lengths are 2.99 Å. In the fifth Au site, Au(5) is bonded in a 3-coordinate geometry to three equivalent Au(3) and three equivalent In(2) atoms. All Au(5)-In(2) bond lengths are 2.94 Å. In the sixth Au site, Au(6) is bonded in a distorted trigonal planar geometry to three equivalent Au(3) and three equivalent In(2) atoms. All Au(6)-In(2) bond lengths are 2.87 Å. There are two inequivalent In sites. In the first In site, In(1) is bonded in a 9-coordinate geometry to three equivalent Au(1), three equivalent Au(2), and three equivalent Au(4) atoms. In the second In site, In(2) is bonded in a 11-coordinate geometry to one Au(4), one Au(5), one Au(6), two equivalent Au(2), two equivalent Au(3), and four equivalent Au(1) atoms.