Abstract
In this work, we study the effect of increasing temperature on the structure parameters (lattice, sulfur-sulfur distance, and ruthenium-sulfur distance) and the energy gap of RuS2. However, it was very challenging to obtain a sample of RuS2 due to many factors, some of which are discussed in the introduction. To prepare the crystal growth of RuS2, we have used the chemical vapor transport technique. The crystals obtained show a pyrite structure, of which we studied its crystallographic structure, including the structure of crystals in surface (100). The sample was then characterized by X-ray diffraction and by microprobe analysis. We determine the relationship between the energy gap and the sulfur-sulfur distance. We analyzed the S-S bond compared with the S-2 molecule.