K23(Au4Sn3)3 crystallizes in the tetragonal I-42m space group. There are five inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to two equivalent Au(1), two equivalent Au(2), and one Sn(2) atom. In the second K site, K(2) is bonded in a 4-coordinate geometry to two equivalent Au(2) and two equivalent Sn(3) atoms. In the third K site, K(3) is bonded in a 6-coordinate geometry to four equivalent Au(1) and two equivalent Sn(1) atoms. In the fourth K site, K(4) is bonded in a 4-coordinate geometry to two equivalent Au(2) and two equivalent Sn(2) atoms. In the fifth K site, K(5) is bonded in a 6-coordinate geometry to two equivalent K(5) and four equivalent Sn(3) atoms. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded to one K(3), four equivalent K(1), one Sn(1), and one Sn(2) atom to form a mixture of distorted face, corner, and edge-sharing AuK5Sn2 pentagonal bipyramids. In the second Au site, Au(2) is bonded in a 7-coordinate geometry to one K(4), two equivalent K(1), two equivalent K(2), one Sn(2), and one Sn(3) atom. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 6-coordinate geometry to two equivalent K(3) and four equivalent Au(1) atoms. In the second Sn site, Sn(2) is bonded in a 3-coordinate geometry to two equivalent K(1), two equivalent K(4), one Au(1), and two equivalent Au(2) atoms. In the third Sn site, Sn(3) is bonded in a distorted water-like geometry to two equivalent K(5), four equivalent K(2), and two equivalent Au(2) atoms.
K23(Au4Sn3)3 crystallizes in the tetragonal I-42m space group. There are five inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to two equivalent Au(1), two equivalent Au(2), and one Sn(2) atom. There is one shorter (3.27 Å) and one longer (3.64 Å) K(1)-Au(1) bond length. There is one shorter (3.34 Å) and one longer (3.41 Å) K(1)-Au(2) bond length. The K(1)-Sn(2) bond length is 3.81 Å. In the second K site, K(2) is bonded in a 4-coordinate geometry to two equivalent Au(2) and two equivalent Sn(3) atoms. There is one shorter (3.31 Å) and one longer (3.56 Å) K(2)-Au(2) bond length. There is one shorter (3.69 Å) and one longer (3.85 Å) K(2)-Sn(3) bond length. In the third K site, K(3) is bonded in a 6-coordinate geometry to four equivalent Au(1) and two equivalent Sn(1) atoms. All K(3)-Au(1) bond lengths are 3.33 Å. Both K(3)-Sn(1) bond lengths are 3.50 Å. In the fourth K site, K(4) is bonded in a 4-coordinate geometry to two equivalent Au(2) and two equivalent Sn(2) atoms. Both K(4)-Au(2) bond lengths are 3.44 Å. There is one shorter (3.52 Å) and one longer (3.86 Å) K(4)-Sn(2) bond length. In the fifth K site, K(5) is bonded in a 6-coordinate geometry to two equivalent K(5) and four equivalent Sn(3) atoms. Both K(5)-K(5) bond lengths are 3.50 Å. All K(5)-Sn(3) bond lengths are 3.98 Å. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded to one K(3), four equivalent K(1), one Sn(1), and one Sn(2) atom to form a mixture of distorted face, corner, and edge-sharing AuK5Sn2 pentagonal bipyramids. The Au(1)-Sn(1) bond length is 2.77 Å. The Au(1)-Sn(2) bond length is 2.73 Å. In the second Au site, Au(2) is bonded in a 7-coordinate geometry to one K(4), two equivalent K(1), two equivalent K(2), one Sn(2), and one Sn(3) atom. The Au(2)-Sn(2) bond length is 2.79 Å. The Au(2)-Sn(3) bond length is 2.76 Å. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 6-coordinate geometry to two equivalent K(3) and four equivalent Au(1) atoms. In the second Sn site, Sn(2) is bonded in a 3-coordinate geometry to two equivalent K(1), two equivalent K(4), one Au(1), and two equivalent Au(2) atoms. In the third Sn site, Sn(3) is bonded in a distorted water-like geometry to two equivalent K(5), four equivalent K(2), and two equivalent Au(2) atoms.