K5SnSb3 is alpha Pu-derived structured and crystallizes in the monoclinic P2_1/c space group. There are five inequivalent K sites. In the first K site, K(1) is bonded to one Sb(1), one Sb(2), and two equivalent Sb(3) atoms to form a mixture of distorted corner and edge-sharing KSb4 tetrahedra. In the second K site, K(2) is bonded to one Sb(2), one Sb(3), and two equivalent Sb(1) atoms to form a mixture of distorted corner and edge-sharing KSb4 tetrahedra. In the third K site, K(3) is bonded in a 6-coordinate geometry to two equivalent Sn(1), one Sb(1), one Sb(2), and two equivalent Sb(3) atoms. In the fourth K site, K(4) is bonded in a 4-coordinate geometry to one Sb(1), one Sb(3), and two equivalent Sb(2) atoms. In the fifth K site, K(5) is bonded in a 4-coordinate geometry to one Sn(1), one Sb(3), and two equivalent Sb(1) atoms. Sn(1) is bonded in a 4-coordinate geometry to one K(5), two equivalent K(3), one Sb(1), one Sb(3), and two equivalent Sb(2) atoms. There are three inequivalent Sb sites. In the first Sb site, Sb(3) is bonded in a 8-coordinate geometry to one K(2), one K(4), one K(5), two equivalent K(1), two equivalent K(3), and one Sn(1) atom. In the second Sb site, Sb(1) is bonded in a 8-coordinate geometry to one K(1), one K(3), one K(4), two equivalent K(2), two equivalent K(5), and one Sn(1) atom. In the third Sb site, Sb(2) is bonded in a 7-coordinate geometry to one K(1), one K(2), one K(3), two equivalent K(4), and two equivalent Sn(1) atoms.
K5SnSb3 is alpha Pu-derived structured and crystallizes in the monoclinic P2_1/c space group. There are five inequivalent K sites. In the first K site, K(1) is bonded to one Sb(1), one Sb(2), and two equivalent Sb(3) atoms to form a mixture of distorted corner and edge-sharing KSb4 tetrahedra. The K(1)-Sb(1) bond length is 3.55 Å. The K(1)-Sb(2) bond length is 3.53 Å. There is one shorter (3.53 Å) and one longer (3.55 Å) K(1)-Sb(3) bond length. In the second K site, K(2) is bonded to one Sb(2), one Sb(3), and two equivalent Sb(1) atoms to form a mixture of distorted corner and edge-sharing KSb4 tetrahedra. The K(2)-Sb(2) bond length is 3.61 Å. The K(2)-Sb(3) bond length is 3.55 Å. There is one shorter (3.56 Å) and one longer (3.72 Å) K(2)-Sb(1) bond length. In the third K site, K(3) is bonded in a 6-coordinate geometry to two equivalent Sn(1), one Sb(1), one Sb(2), and two equivalent Sb(3) atoms. There is one shorter (3.87 Å) and one longer (3.93 Å) K(3)-Sn(1) bond length. The K(3)-Sb(1) bond length is 3.64 Å. The K(3)-Sb(2) bond length is 3.69 Å. There is one shorter (3.76 Å) and one longer (4.05 Å) K(3)-Sb(3) bond length. In the fourth K site, K(4) is bonded in a 4-coordinate geometry to one Sb(1), one Sb(3), and two equivalent Sb(2) atoms. The K(4)-Sb(1) bond length is 3.68 Å. The K(4)-Sb(3) bond length is 3.61 Å. There is one shorter (3.56 Å) and one longer (3.84 Å) K(4)-Sb(2) bond length. In the fifth K site, K(5) is bonded in a 4-coordinate geometry to one Sn(1), one Sb(3), and two equivalent Sb(1) atoms. The K(5)-Sn(1) bond length is 3.83 Å. The K(5)-Sb(3) bond length is 3.56 Å. There is one shorter (3.68 Å) and one longer (3.74 Å) K(5)-Sb(1) bond length. Sn(1) is bonded in a 4-coordinate geometry to one K(5), two equivalent K(3), one Sb(1), one Sb(3), and two equivalent Sb(2) atoms. The Sn(1)-Sb(1) bond length is 2.89 Å. The Sn(1)-Sb(3) bond length is 2.87 Å. There is one shorter (2.95 Å) and one longer (2.96 Å) Sn(1)-Sb(2) bond length. There are three inequivalent Sb sites. In the first Sb site, Sb(3) is bonded in a 8-coordinate geometry to one K(2), one K(4), one K(5), two equivalent K(1), two equivalent K(3), and one Sn(1) atom. In the second Sb site, Sb(1) is bonded in a 8-coordinate geometry to one K(1), one K(3), one K(4), two equivalent K(2), two equivalent K(5), and one Sn(1) atom. In the third Sb site, Sb(2) is bonded in a 7-coordinate geometry to one K(1), one K(2), one K(3), two equivalent K(4), and two equivalent Sn(1) atoms.