The ternary reduced molybdenum sulphide Cs similar to 1Mo12S14 has been synthesized by solid-state reaction at 1400 degrees C for 96 h in sealed molybdenum crucibles. The compound crystallizes in the trigonal space group P (3) over bar 1c with the following lattice parameters: a = 9.9793 (2) angstrom, c = 6.3730 (2) angstrom, Z = 1. Its crystal structure was determined from single crystal X-ray diffraction data and consists of interconnected (Mo6S8S6a)-S-i units forming an original three-dimensional framework in which large tunnels are occupied randomly by the Cs+ ions. Cs-133 static NMR studies are in favor of a static cesium disorder. Unlike Ba4Mo12S18 where some (Mo6S8S6a)-S-i units are also connected through Si-i ligands, this connection mode does not lead to significant interactions in the title compound. Single-crystal resistivity measurements show that Cs similar to 1Mo12S14 presents a metallic behavior with a superconducting transition at 7.7 K as confirmed by magnetic measurements.