(n = 1–4) clusters in the gas phase

Positively charged ions, Te n S 4 + (n = 1–4), are detected in the laser desorption mass spectra of bulk TeS. Enhanced intensities for these species are seen only for the positive ions. The clusters are formed as a result of the ion chemistry in the gas phase as elemental mixtures of Te and S also give the same clusters, albeit with different intensity distribution. Computational studies confirm the structural and electronic stability of these species. Te 3 S 4 + and Te 4 S 4 + clusters are observed for the first time in the gas phase.