New ternary and quaternary molybdenum cluster chalcohalides were obtained by high-temperature reactions between Mo, chalcogens, and halogens in evacuated ampules. The crystal structures of [Mo3Se7(TeBr3)Br-2](2)[Te2Br10] (1), [Mo3Se7(TeI3)I-2]I (2), and [Mo3Te7(TeI3)(3)](2)(I)(TeI3) (3) were determined by single-crystal X-ray diffraction. The structures of 1 and 2 consist of positively charged zigzag chains (1)(infinity)[Mo3Se7(TeX3)X-4/2] (X = Br, I), with Te2Br102- and I-, respectively, as counterions. The TeI3- and TeBr3- ions function as bidentate ligands in 1 and 2. In 3, TeI3- is not coordinated to the metal but acts as a counterion to the [Mo3Te7(TeI3)(3)](+) cluster cation.