K3Au5Tl crystallizes in the orthorhombic Imma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 11-coordinate geometry to three equivalent Au(1), three equivalent Au(3), four equivalent Au(2), and one Tl(1) atom. In the second K site, K(2) is bonded in a 6-coordinate geometry to six equivalent Au(3) atoms. There are three inequivalent Au sites. In the first Au site, Au(1) is bonded to six equivalent K(1), two equivalent Au(3), and four equivalent Au(2) atoms to form a mixture of face and edge-sharing AuK6Au6 cuboctahedra. In the second Au site, Au(2) is bonded in a distorted q6 geometry to four equivalent K(1), two equivalent Au(1), two equivalent Au(2), and two equivalent Au(3) atoms. In the third Au site, Au(3) is bonded in a 10-coordinate geometry to three equivalent K(1), three equivalent K(2), one Au(1), two equivalent Au(2), and one Tl(1) atom. Tl(1) is bonded in a distorted water-like geometry to two equivalent K(1) and two equivalent Au(3) atoms.
K3Au5Tl crystallizes in the orthorhombic Imma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 11-coordinate geometry to three equivalent Au(1), three equivalent Au(3), four equivalent Au(2), and one Tl(1) atom. There are two shorter (3.49 Å) and one longer (3.64 Å) K(1)-Au(1) bond length. There are two shorter (3.35 Å) and one longer (3.74 Å) K(1)-Au(3) bond length. There are two shorter (3.43 Å) and two longer (3.47 Å) K(1)-Au(2) bond lengths. The K(1)-Tl(1) bond length is 3.70 Å. In the second K site, K(2) is bonded in a 6-coordinate geometry to six equivalent Au(3) atoms. There are two shorter (3.52 Å) and four longer (3.60 Å) K(2)-Au(3) bond lengths. There are three inequivalent Au sites. In the first Au site, Au(1) is bonded to six equivalent K(1), two equivalent Au(3), and four equivalent Au(2) atoms to form a mixture of face and edge-sharing AuK6Au6 cuboctahedra. Both Au(1)-Au(3) bond lengths are 2.89 Å. All Au(1)-Au(2) bond lengths are 2.79 Å. In the second Au site, Au(2) is bonded in a distorted q6 geometry to four equivalent K(1), two equivalent Au(1), two equivalent Au(2), and two equivalent Au(3) atoms. Both Au(2)-Au(2) bond lengths are 2.84 Å. Both Au(2)-Au(3) bond lengths are 2.80 Å. In the third Au site, Au(3) is bonded in a 10-coordinate geometry to three equivalent K(1), three equivalent K(2), one Au(1), two equivalent Au(2), and one Tl(1) atom. The Au(3)-Tl(1) bond length is 2.76 Å. Tl(1) is bonded in a distorted water-like geometry to two equivalent K(1) and two equivalent Au(3) atoms.