K3SbSe4 crystallizes in the trigonal R3c space group. K(1) is bonded in a 6-coordinate geometry to one Se(2) and five equivalent Se(1) atoms. Sb(1) is bonded in a tetrahedral geometry to one Se(2) and three equivalent Se(1) atoms. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 6-coordinate geometry to five equivalent K(1) and one Sb(1) atom. In the second Se site, Se(2) is bonded in a trigonal pyramidal geometry to three equivalent K(1) and one Sb(1) atom.
K3SbSe4 crystallizes in the trigonal R3c space group. K(1) is bonded in a 6-coordinate geometry to one Se(2) and five equivalent Se(1) atoms. The K(1)-Se(2) bond length is 3.31 Å. There are a spread of K(1)-Se(1) bond distances ranging from 3.28-3.67 Å. Sb(1) is bonded in a tetrahedral geometry to one Se(2) and three equivalent Se(1) atoms. The Sb(1)-Se(2) bond length is 2.49 Å. All Sb(1)-Se(1) bond lengths are 2.51 Å. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 6-coordinate geometry to five equivalent K(1) and one Sb(1) atom. In the second Se site, Se(2) is bonded in a trigonal pyramidal geometry to three equivalent K(1) and one Sb(1) atom.