where to find the force field parameters for F and P atom?

From: yxiong_at_mail.ccnu.edu.cn
Date: Tue Dec 09 2003 - 20:04:01 CST

Dear sir,
  I want to do a MD calculation with the system including F and P atom. However I
can't find these relevant parameters in AMBER or CHARMM force field parameters. If
you can give me some suggestions or clues on where I can find them, I will be very
appreciated your help!

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