The ground state rotational spectra of 12 different isotopologues sulphur dioxide have been refitted in a consistent way and an accurate experimental cubic force field has determined. experimental, semi-experimental ab initio equilibrium structures calculated found good agreement across themselves. Different approximations limiting the accuracy are discussed. In particular, influence centrifuga...

The roasting of sulphide ores and concentrates is often the first step in the production of metals or chemicals. In many processes, the production of sulphuric acid is viewed as a by-product, while in some plants production is an important economic factor. Regardless of the purpose, a pyrite roasting plant consists of mainly three plant sections: roasting, gas cleaning and sulphuric acid. With ...