bond_coeff and angle_coeff of FE

Dear Lammps users
i am working on RDF forf FE +H2O mixture. I am unable to find the

1- bond_coeff for FE-FE
2- angle_coeff for FE-FE-FE

those are determined by the force field that you are using, if there should be such bond and angle interactions in the first place.
you have to look those up in the publication(s) describing that force field. it is impossible to tell you those “coeff” parameters without knowing that (and more specifically, the pair_style, bond_style and angle_style; BTW: why not also dihedral_coeffs if you are using a model with bonded Fe-Fe interactions?).