.TILMedia.BaseClasses.PartialGas_pT .TILMedia.BaseClasses.PartialGas_pTThe gas model Gas_pT calculates the thermopyhsical property data
with given inputs: pressure (p), temperature (T), mass fraction
(xi) and the parameter gasType.
The interface and the way of using, is demonstrated in the Testers
-> TestGas.