K3Mo2Cl9 crystallizes in the hexagonal P6_3/m space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to six equivalent Cl(2) atoms. In the second K site, K(2) is bonded in a 9-coordinate geometry to three equivalent Cl(1) and six equivalent Cl(2) atoms. Mo(1) is bonded to three equivalent Cl(1) and three equivalent Cl(2) atoms to form face-sharing MoCl6 octahedra. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 3-coordinate geometry to one K(2) and two equivalent Mo(1) atoms. In the second Cl site, Cl(2) is bonded in a distorted see-saw-like geometry to one K(2), two equivalent K(1), and one Mo(1) atom.
K3Mo2Cl9 crystallizes in the hexagonal P6_3/m space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to six equivalent Cl(2) atoms. There are three shorter (3.26 Å) and three longer (3.30 Å) K(1)-Cl(2) bond lengths. In the second K site, K(2) is bonded in a 9-coordinate geometry to three equivalent Cl(1) and six equivalent Cl(2) atoms. All K(2)-Cl(1) bond lengths are 3.22 Å. All K(2)-Cl(2) bond lengths are 3.47 Å. Mo(1) is bonded to three equivalent Cl(1) and three equivalent Cl(2) atoms to form face-sharing MoCl6 octahedra. All Mo(1)-Cl(1) bond lengths are 2.49 Å. All Mo(1)-Cl(2) bond lengths are 2.40 Å. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a 3-coordinate geometry to one K(2) and two equivalent Mo(1) atoms. In the second Cl site, Cl(2) is bonded in a distorted see-saw-like geometry to one K(2), two equivalent K(1), and one Mo(1) atom.