K2Hg3Se4 crystallizes in the orthorhombic Pbcn space group. K(1) is bonded in a 6-coordinate geometry to three equivalent Se(1) and three equivalent Se(2) atoms. There are two inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a tetrahedral geometry to two equivalent Se(1) and two equivalent Se(2) atoms. In the second Hg site, Hg(2) is bonded in a distorted linear geometry to one Se(1) and one Se(2) atom. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 5-coordinate geometry to three equivalent K(1), one Hg(1), and one Hg(2) atom. In the second Se site, Se(2) is bonded in a 5-coordinate geometry to three equivalent K(1), one Hg(1), and one Hg(2) atom.
K2Hg3Se4 crystallizes in the orthorhombic Pbcn space group. K(1) is bonded in a 6-coordinate geometry to three equivalent Se(1) and three equivalent Se(2) atoms. There are a spread of K(1)-Se(1) bond distances ranging from 3.39-3.44 Å. There are a spread of K(1)-Se(2) bond distances ranging from 3.35-3.41 Å. There are two inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a tetrahedral geometry to two equivalent Se(1) and two equivalent Se(2) atoms. Both Hg(1)-Se(1) bond lengths are 2.73 Å. Both Hg(1)-Se(2) bond lengths are 2.71 Å. In the second Hg site, Hg(2) is bonded in a distorted linear geometry to one Se(1) and one Se(2) atom. The Hg(2)-Se(1) bond length is 2.50 Å. The Hg(2)-Se(2) bond length is 2.51 Å. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 5-coordinate geometry to three equivalent K(1), one Hg(1), and one Hg(2) atom. In the second Se site, Se(2) is bonded in a 5-coordinate geometry to three equivalent K(1), one Hg(1), and one Hg(2) atom.