If you are interested in charge values for your Cerium complex, you
could use R.E.D. Server Development .
http://q4md-forcefieldtools.org/REDS-Development/
'R.E.D. Server Development' handles all the elements of the periodic
table (but a few ones) compared to 'R.E.D. Server'.
> I only started using AMBER last week, but I am looking for the parameters
> for a cerium oxygen compound. I found information on Organocerium
> chemistry, so I am assuming that someone else has done work in this area.
> If you could help me locate the information, I would greatly appreciate it.
> We have decided that there is no immediate need to use QM parameters or do
> QM calculations, so a paramfit is a little extensive. This is more of a
> superficial simulation, but our current simulation programs are not meant
> for organic molecules. (I will be grouping the ceria informations with an
> animo acid).