K8In11 crystallizes in the trigonal R-3c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 3-coordinate geometry to three equivalent In(1) and six equivalent In(2) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to one In(1), two equivalent In(3), and four equivalent In(2) atoms. There are three inequivalent In sites. In the first In site, In(1) is bonded in a 10-coordinate geometry to two equivalent K(1), two equivalent K(2), two equivalent In(3), and four equivalent In(2) atoms. In the second In site, In(2) is bonded in a 10-coordinate geometry to two equivalent K(1), four equivalent K(2), one In(2), one In(3), and two equivalent In(1) atoms. In the third In site, In(3) is bonded in a 12-coordinate geometry to six equivalent K(2), three equivalent In(1), and three equivalent In(2) atoms.
K8In11 crystallizes in the trigonal R-3c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 3-coordinate geometry to three equivalent In(1) and six equivalent In(2) atoms. All K(1)-In(1) bond lengths are 4.15 Å. There are three shorter (3.81 Å) and three longer (4.09 Å) K(1)-In(2) bond lengths. In the second K site, K(2) is bonded in a 7-coordinate geometry to one In(1), two equivalent In(3), and four equivalent In(2) atoms. The K(2)-In(1) bond length is 3.65 Å. There is one shorter (3.97 Å) and one longer (4.02 Å) K(2)-In(3) bond length. There are a spread of K(2)-In(2) bond distances ranging from 3.69-4.02 Å. There are three inequivalent In sites. In the first In site, In(1) is bonded in a 10-coordinate geometry to two equivalent K(1), two equivalent K(2), two equivalent In(3), and four equivalent In(2) atoms. Both In(1)-In(3) bond lengths are 3.33 Å. There are two shorter (3.01 Å) and two longer (3.11 Å) In(1)-In(2) bond lengths. In the second In site, In(2) is bonded in a 10-coordinate geometry to two equivalent K(1), four equivalent K(2), one In(2), one In(3), and two equivalent In(1) atoms. The In(2)-In(2) bond length is 3.15 Å. The In(2)-In(3) bond length is 3.10 Å. In the third In site, In(3) is bonded in a 12-coordinate geometry to six equivalent K(2), three equivalent In(1), and three equivalent In(2) atoms.