Sr2Au3In4 crystallizes in the hexagonal P-62m space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 13-coordinate geometry to one Au(3), four equivalent Au(1), two equivalent In(1), two equivalent In(2), and four equivalent In(3) atoms. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to six equivalent Au(1) atoms. In the third Sr site, Sr(3) is bonded in a 16-coordinate geometry to two equivalent Au(3), four equivalent Au(2), two equivalent In(2), two equivalent In(3), two equivalent In(4), and four equivalent In(1) atoms. There are three inequivalent Au sites. In the first Au site, Au(3) is bonded in a 9-coordinate geometry to one Sr(1), two equivalent Sr(3), two equivalent In(1), and four equivalent In(3) atoms. In the second Au site, Au(1) is bonded in a 9-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one In(2), two equivalent In(1), and two equivalent In(3) atoms. In the third Au site, Au(2) is bonded in a 9-coordinate geometry to four equivalent Sr(3), one In(4), two equivalent In(1), and two equivalent In(2) atoms. There are four inequivalent In sites. In the first In site, In(1) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Sr(3), one Au(2), one Au(3), and two equivalent Au(1) atoms. In the second In site, In(2) is bonded to two equivalent Sr(1), two equivalent Sr(3), two equivalent Au(1), and two equivalent Au(2) atoms to form a mixture of distorted edge and corner-sharing InSr4Au4 tetrahedra. In the third In site, In(3) is bonded in a 4-coordinate geometry to one Sr(3), two equivalent Sr(1), two equivalent Au(1), and two equivalent Au(3) atoms. In the fourth In site, In(4) is bonded in a distorted trigonal planar geometry to six equivalent Sr(3) and three equivalent Au(2) atoms.
Sr2Au3In4 crystallizes in the hexagonal P-62m space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 13-coordinate geometry to one Au(3), four equivalent Au(1), two equivalent In(1), two equivalent In(2), and four equivalent In(3) atoms. The Sr(1)-Au(3) bond length is 3.09 Å. All Sr(1)-Au(1) bond lengths are 3.29 Å. Both Sr(1)-In(1) bond lengths are 3.41 Å. Both Sr(1)-In(2) bond lengths are 3.48 Å. All Sr(1)-In(3) bond lengths are 3.49 Å. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to six equivalent Au(1) atoms. All Sr(2)-Au(1) bond lengths are 3.45 Å. In the third Sr site, Sr(3) is bonded in a 16-coordinate geometry to two equivalent Au(3), four equivalent Au(2), two equivalent In(2), two equivalent In(3), two equivalent In(4), and four equivalent In(1) atoms. Both Sr(3)-Au(3) bond lengths are 3.37 Å. All Sr(3)-Au(2) bond lengths are 3.56 Å. Both Sr(3)-In(2) bond lengths are 3.69 Å. Both Sr(3)-In(3) bond lengths are 3.84 Å. Both Sr(3)-In(4) bond lengths are 3.57 Å. All Sr(3)-In(1) bond lengths are 3.80 Å. There are three inequivalent Au sites. In the first Au site, Au(3) is bonded in a 9-coordinate geometry to one Sr(1), two equivalent Sr(3), two equivalent In(1), and four equivalent In(3) atoms. Both Au(3)-In(1) bond lengths are 2.75 Å. All Au(3)-In(3) bond lengths are 3.00 Å. In the second Au site, Au(1) is bonded in a 9-coordinate geometry to two equivalent Sr(1), two equivalent Sr(2), one In(2), two equivalent In(1), and two equivalent In(3) atoms. The Au(1)-In(2) bond length is 2.93 Å. Both Au(1)-In(1) bond lengths are 2.88 Å. There is one shorter (2.83 Å) and one longer (2.84 Å) Au(1)-In(3) bond length. In the third Au site, Au(2) is bonded in a 9-coordinate geometry to four equivalent Sr(3), one In(4), two equivalent In(1), and two equivalent In(2) atoms. The Au(2)-In(4) bond length is 2.71 Å. Both Au(2)-In(1) bond lengths are 2.92 Å. Both Au(2)-In(2) bond lengths are 2.75 Å. There are four inequivalent In sites. In the first In site, In(1) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Sr(3), one Au(2), one Au(3), and two equivalent Au(1) atoms. In the second In site, In(2) is bonded to two equivalent Sr(1), two equivalent Sr(3), two equivalent Au(1), and two equivalent Au(2) atoms to form a mixture of distorted edge and corner-sharing InSr4Au4 tetrahedra. In the third In site, In(3) is bonded in a 4-coordinate geometry to one Sr(3), two equivalent Sr(1), two equivalent Au(1), and two equivalent Au(3) atoms. In the fourth In site, In(4) is bonded in a distorted trigonal planar geometry to six equivalent Sr(3) and three equivalent Au(2) atoms.