[Question] Model definition from different sources

[LeoSchmider]

Can I call an EoS model with defined compound vector from my own DB and Clapeyron's DB. What I mean by that is: Can I define a model like this :

using Clapeyron
model = PR(["Water","MyOwnMolecule"],userlocations=["csv_file_with_my_own_molecule_properties_only_without_water's_properties.csv"])

Should I leave an empty space in the first row of my csv file for Clapeyron to take is own values for water's parameters ?
Or should I copy-paste Clapeyron's values for properties of Water in my csv file ?

[pw0908]

Yes you can, and in the way you've shown here. If the species already exists in our database, you don't need to include it again in your own database unless you want to provide different parameters.

Bear in mind that the case of cubics involves a few submodels, namely the alpha model which also needs to be parameterized. You can see our docs for an example: https://clapeyronthermo.github.io/Clapeyron.jl/stable/tutorials/user_defined_parameters/

I'd imagine leaving a row blank will lead to an error?

[LeoSchmider]

Ok, thank you very much for your answer, if you want I can try to test it and give you feedback on it. I imagine that for multiple components mixture and cubics EoS models that k_ij matrix should be given but can it be given from a correlation script ?
One more question, does clapeyron uses as a primary key for identificación of compounds CAS number or is the only available primary key the substance name ?