K(SbSe2)2 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 8-coordinate geometry to one Se(1), two equivalent Se(2), two equivalent Se(3), and three equivalent Se(4) atoms. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a distorted see-saw-like geometry to one Se(1), one Se(2), one Se(3), and one Se(4) atom. In the second Sb site, Sb(2) is bonded in a rectangular see-saw-like geometry to one Se(2), one Se(4), and two equivalent Se(1) atoms. There are four inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted rectangular see-saw-like geometry to one K(1), one Sb(1), and two equivalent Sb(2) atoms. In the second Se site, Se(2) is bonded in a 4-coordinate geometry to two equivalent K(1), one Sb(1), and one Sb(2) atom. In the third Se site, Se(3) is bonded in a 4-coordinate geometry to two equivalent K(1), one Sb(1), and one Se(3) atom. In the fourth Se site, Se(4) is bonded in a 5-coordinate geometry to three equivalent K(1), one Sb(1), and one Sb(2) atom.
K(SbSe2)2 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 8-coordinate geometry to one Se(1), two equivalent Se(2), two equivalent Se(3), and three equivalent Se(4) atoms. The K(1)-Se(1) bond length is 3.42 Å. There is one shorter (3.37 Å) and one longer (3.57 Å) K(1)-Se(2) bond length. There is one shorter (3.46 Å) and one longer (3.58 Å) K(1)-Se(3) bond length. There are a spread of K(1)-Se(4) bond distances ranging from 3.45-3.86 Å. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a distorted see-saw-like geometry to one Se(1), one Se(2), one Se(3), and one Se(4) atom. The Sb(1)-Se(1) bond length is 3.23 Å. The Sb(1)-Se(2) bond length is 2.59 Å. The Sb(1)-Se(3) bond length is 2.69 Å. The Sb(1)-Se(4) bond length is 2.60 Å. In the second Sb site, Sb(2) is bonded in a rectangular see-saw-like geometry to one Se(2), one Se(4), and two equivalent Se(1) atoms. The Sb(2)-Se(2) bond length is 2.82 Å. The Sb(2)-Se(4) bond length is 2.67 Å. There is one shorter (2.56 Å) and one longer (2.95 Å) Sb(2)-Se(1) bond length. There are four inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted rectangular see-saw-like geometry to one K(1), one Sb(1), and two equivalent Sb(2) atoms. In the second Se site, Se(2) is bonded in a 4-coordinate geometry to two equivalent K(1), one Sb(1), and one Sb(2) atom. In the third Se site, Se(3) is bonded in a 4-coordinate geometry to two equivalent K(1), one Sb(1), and one Se(3) atom. The Se(3)-Se(3) bond length is 2.40 Å. In the fourth Se site, Se(4) is bonded in a 5-coordinate geometry to three equivalent K(1), one Sb(1), and one Sb(2) atom.