[lammps-users] source for force field parameters

Hi

This might be the wrong place to ask for that, but I hope that someone might have a hint for me. I am looking for force field parameters to simulate a Li2SO4 glass with and without nitrogen additions. Do you have any ideas where I might find such parameters? So far my search on the internet (Web of Science etc.) didnt provide anything appropriate. Is there perhaps a book which lists parameters for different force fields?

Best regards
Christian M�ller