Order parameter from radial distribution function (RDF)

Hi All,

I want to prediction the begening of phase seperation between 2 liquid' or liquid and solid, but I have a question:

As we know we can predict the phase seperation from order parameter in MesoDyn, but the calculations aren't atom base, so the results are controversial.

1- Can we calculate the order parameter from RDF (result of Forcite tool)? I have an idea which hase been attached.

Does anyone agree with this idea?

2- How can we interpret the results of order parameter for detecting the begining of phase seperation? What's the procedure?

Regards