Using a semiclassical approach, we have calculated electron-, proton-,
Mg II-, Si II-, Fe II-, and Ar II- impact line widths and shifts for
267 Mg I multiplets, in order to provide the needed Stark broadening p
arameters for all important perturbers for investigation of Solar and
laboratory plasma. An analysis of Solar Rydberg lines in the far infra
red spectrum has been performed as well.