How is mu-Sulfide(dithioxo)diindium (CAS: 12030-24-9) typically synthesized?

Mu-Sulfide(dithioxo)diindium (CAS: 12030-24-9) is often synthesized by the reaction of indium metal with sulfur trioxide in the presence of a suitable solvent. The reaction yields a high yield of the target compound with good selectivity. Common solvents include toluene or chloroform, and the reaction typically requires heating to facilitate the formation of the complex.