IndependentVariablesEnumeration defining the independent variables of a medium  | 
| T | 
         Temperature  | 
    
|---|---|
| pT | 
         Pressure, Temperature  | 
    
| ph | 
         Pressure, Specific Enthalpy  | 
    
| phX | 
         Pressure, Specific Enthalpy, Mass Fraction  | 
    
| pTX | 
         Pressure, Temperature, Mass Fractions  | 
    
| dTX | 
         Density, Temperature, Mass Fractions  |